diff --git a/parser/onnx/CMakeLists.txt b/parser/onnx/CMakeLists.txt
index 77cdcf1..304ae82 100644
--- a/parser/onnx/CMakeLists.txt
+++ b/parser/onnx/CMakeLists.txt
@@ -8,7 +8,9 @@ set(SRC_LIST
     "onnx_parser.cc"
     "onnx_data_parser.cc"
     "onnx_util.cc"
-    "onnx_constant_parser.cc" 
+    "onnx_constant_parser.cc"
+    "subgraph_adapter/if_subgraph_adapter.cc"
+    "subgraph_adapter/subgraph_adapter_factory.cc"
 )
 
 protobuf_generate(ge PROTO_SRCS PROTO_HDRS ${PROTO_LIST})
@@ -31,6 +33,7 @@ target_compile_definitions(fmk_onnx_parser PRIVATE
 
 target_include_directories(fmk_onnx_parser PRIVATE
     ${CMAKE_CURRENT_LIST_DIR}
+    ${CMAKE_CURRENT_LIST_DIR}/subgraph_adapter
     ${PARSER_DIR}
     ${PARSER_DIR}/inc
     ${PARSER_DIR}/parser
diff --git a/parser/onnx/onnx_data_parser.cc b/parser/onnx/onnx_data_parser.cc
index 29f966a..367eb32 100644
--- a/parser/onnx/onnx_data_parser.cc
+++ b/parser/onnx/onnx_data_parser.cc
@@ -35,6 +35,11 @@ Status OnnxDataParser::ParseParams(const Message *op_src, ge::Operator &op_def)
     GELOGE(FAILED, "parse shape of data op %s from model failed", op_def.GetName().c_str());
     return FAILED;
   }
+  // Subgraph data operator don't need parse input shape
+  // the shape mappings from parent node input
+  if (IsSubgraphDataOp()) {
+    return SUCCESS;
+  }
 
   if (ParseInputFromUser(op_def) != SUCCESS) {
     GELOGE(FAILED, "parse shape of data op %s from user failed", op_def.GetName().c_str());
@@ -72,15 +77,23 @@ Status OnnxDataParser::ParseInputFromModel(const Message *op_src, ge::Operator &
   // Get attr t:'input_tensor' form NodeProto
   int64_t data_type = 1;
   int64_t index = 0;
+  is_subgraph_data_op_ = false;
   for (auto it : node->attribute()) {
     if (it.name() == ge::kAttrNameInput) {
       data_type = ParseInputTensor(it);
     } else if (it.name() == ge::kAttrNameIndex) {
       index = it.i();
       GELOGI("The node has attribute with index: %ld", index);
+    } else if (it.name() == ge::kAttrNameIsSubgraphOp) {
+      is_subgraph_data_op_ = true;
     }
   }
 
+  op_def.SetAttr(ge::ATTR_NAME_INDEX, index);
+  if (IsSubgraphDataOp()) {
+    return SUCCESS;
+  }
+
   // Trans onnx type to ge type
   DataType type = OnnxUtil::ConvertOnnxDataType(data_type);
   if (type == ge::DataType::DT_UNDEFINED) {
@@ -88,7 +101,6 @@ Status OnnxDataParser::ParseInputFromModel(const Message *op_src, ge::Operator &
     return FAILED;
   }
   op_def.SetAttr(ge::DATA_ATTR_NAME_DATA_TYPE, static_cast<int64_t>(type));
-  op_def.SetAttr(ge::ATTR_NAME_INDEX, index);
 
   return SUCCESS;
 }
diff --git a/parser/onnx/onnx_data_parser.h b/parser/onnx/onnx_data_parser.h
index 9650af6..fdc59e2 100644
--- a/parser/onnx/onnx_data_parser.h
+++ b/parser/onnx/onnx_data_parser.h
@@ -32,11 +32,17 @@ class PARSER_FUNC_VISIBILITY OnnxDataParser : public OnnxOpParser {
 
   Status ParseInputFromUser(const ge::Operator &op_def);
 
+  bool IsSubgraphDataOp() {
+    return is_subgraph_data_op_;
+  }
+
   int64_t ParseInputTensor(const ge::onnx::AttributeProto &attribute);
 
   std::vector<int64_t> model_input_dims_v_;
 
   std::vector<int64_t> user_input_dims_v_;
+
+  bool is_subgraph_data_op_;
 };
 }  // namespace ge
 
diff --git a/parser/onnx/onnx_parser.cc b/parser/onnx/onnx_parser.cc
index 8745fb9..39b4bc8 100644
--- a/parser/onnx/onnx_parser.cc
+++ b/parser/onnx/onnx_parser.cc
@@ -17,6 +17,7 @@
 #include "onnx_parser.h"
 #include <algorithm>
 #include <iostream>
+#include <queue>
 #include "common/convert/pb2json.h"
 #include "common/util.h"
 #include "common/util/error_manager/error_manager.h"
@@ -37,6 +38,9 @@
 #include "parser/onnx/onnx_util.h"
 #include "register/op_registry.h"
 #include "register/register_fmk_types.h"
+#include "graph/utils/graph_utils.h"
+#include "graph/utils/node_utils.h"
+#include "subgraph_adapter/subgraph_adapter_factory.h"
 
 namespace ge {
 graphStatus PrepareBeforeParse(AclGrphParseUtil &acl_graph_parse_util,
@@ -95,7 +99,7 @@ graphStatus aclgrphParseONNX(const char *model_file,
   }
 
   GE_CHECK_NOTNULL(model_parser);
-  // parse caffe model_file to GE graph
+  // parse onnx model_file to GE graph
   ge::graphStatus ret = model_parser->Parse(model_file, graph);
   if (ret != ge::SUCCESS) {
     GELOGE(ret, "Parser graph %s failed.", graph.GetName().c_str());
@@ -144,18 +148,130 @@ graphStatus aclgrphParseONNXFromMem(const char *buffer, size_t size,
 namespace ge {
 namespace {
 const std::map<std::string, std::string> kOnnxOpMap = {
-    {ge::kOpTypeInput, ge::parser::DATA}, {ge::kOpTypeConstant, ge::parser::CONSTANT},
+    {ge::kOpTypeInput, ge::parser::DATA},
+    {ge::kOpTypeConstant, ge::parser::CONSTANT}
 };
-const char* const MATMULV2 = "MatMulV2";
-const std::vector<std::string> kNoNeedUpdateFormat = {MATMULV2};
 const int64_t kDimValue = 1;
+
+struct ParseArg {
+  ge::onnx::GraphProto *onnx_graph;
+  ge::NodePtr parent_node;
+  std::string graph_name;
+  uint32_t subgraph_index;
+};
+
+Status GenSubgraphParseTasks(const ge::ComputeGraphPtr &parent_graph, std::deque<ParseArg> &args) {
+  GELOGI("Gen subgraph parse tasks start");
+  for (auto &node : parent_graph->GetDirectNode()) {
+    auto op_desc = node->GetOpDesc();
+    GE_CHECK_NOTNULL(op_desc);
+    for (const auto subgraph_name_to_index : op_desc->GetSubgraphNameIndexes()) {
+      auto i = subgraph_name_to_index.second;
+      auto subgraph_iname = subgraph_name_to_index.first;
+      if (subgraph_iname.empty()) {
+        GELOGW("The subgraph index %u of node %s is empty", i, node->GetName().c_str());
+        continue;
+      }
+
+      // change the graph name to ensure it is unique in GE
+      std::string unique_subgraph_name;
+      OnnxUtil::GenUniqueSubgraphName(i, subgraph_iname, node->GetName(), unique_subgraph_name);
+
+      GELOGD("Add subgraph parse task to the queue, node %s, index %u, subgraph instance name %s",
+             node->GetName().c_str(), i, unique_subgraph_name.c_str());
+      args.push_back({nullptr, node, unique_subgraph_name, i});
+    }
+  }
+  GELOGI("Gen subgraph parse tasks end");
+  return SUCCESS;
+}
+
+Status BuildLinkForChildAndParentGraph(const ge::ComputeGraphPtr &sub_graph, const ParseArg &arg) {
+  if (arg.parent_node == nullptr) {
+    return SUCCESS;
+  }
+  auto parent_node = arg.parent_node;
+  auto index = arg.subgraph_index;
+  auto ret = ge::NodeUtils::SetSubgraph(*parent_node, index, sub_graph);
+  if (ret != SUCCESS) {
+    GELOGE(ret, "[Set][Subgraph] Failed to set subgraph %s to node %s index %u", sub_graph->GetName().c_str(),
+           parent_node->GetName().c_str(), index);
+    REPORT_CALL_ERROR("E19999", "Failed to set subgraph %s to node %s index %u", sub_graph->GetName().c_str(),
+                      parent_node->GetName().c_str(), index);
+    return ret;
+  }
+  return SUCCESS;
 }
 
-Status OnnxModelParser::ParseInput(ge::onnx::GraphProto &onnx_graph,
-                                   std::map<std::string, ge::onnx::TensorProto> &initializer_name_tensor) {
-  if (onnx_graph.input_size() == 0) {
+Status PostOpProcessForSubgraph(const ParseArg &arg, ge::ComputeGraphPtr sub_graph) {
+  if (arg.parent_node == nullptr) {
+    return SUCCESS;
+  }
+  std::string op_type = arg.parent_node->GetType();
+  std::string op_name = arg.parent_node->GetName();
+  domi::ParseSubgraphFuncV2 parse_func_v2 = nullptr;
+  auto post_func =
+      domi::OpRegistry::Instance()->GetParseSubgraphPostFunc(op_type);
+  if (post_func == nullptr) {
+    GELOGW("The subgraph post func for node %s type %s is null", op_name.c_str(), op_type.c_str());
+    if (domi::OpRegistry::Instance()->GetParseSubgraphPostFunc(op_type, parse_func_v2) != SUCCESS || parse_func_v2 == nullptr) {
+      GELOGW("The subgraph post func v2 for node %s type %s is null", op_name.c_str(), op_type.c_str());
+      return SUCCESS;
+    }
+  }
+
+  GELOGD("Post process for subgraph %s node %s type %s", arg.graph_name.c_str(), arg.parent_node->GetName().c_str(),
+         arg.parent_node->GetType().c_str());
+
+  // Refresh node_name in subgraph
+  for (const ge::NodePtr &node : sub_graph->GetDirectNode()) {
+    if (node->GetOpDesc() == nullptr) {
+      continue;
+    }
+    node->GetOpDesc()->SetName(sub_graph->GetName() + "/" + node->GetName());
+  }
+
+  auto graph = ge::GraphUtils::CreateGraphFromComputeGraph(sub_graph);
+  Status ret = FAILED;
+  if (post_func != nullptr) {
+    ret = post_func(arg.graph_name, graph);
+  } else if (parse_func_v2 != nullptr) {
+    ret = parse_func_v2(arg.graph_name.c_str(), graph);
+  }
+  if (ret != SUCCESS) {
+    GELOGE(FAILED, "[PostProcess][Subgraph]Failed to post-process subgraph %s on node %s type %s",
+           arg.graph_name.c_str(), arg.parent_node->GetName().c_str(), arg.parent_node->GetType().c_str());
+    REPORT_CALL_ERROR("E19999", "Failed to post-process subgraph %s on node %s type %s",
+                      arg.graph_name.c_str(), arg.parent_node->GetName().c_str(), arg.parent_node->GetType().c_str());
+    return FAILED;
+  }
+  return SUCCESS;
+}
+}
+
+Status OnnxModelParser::ParseOutput(ge::onnx::GraphProto &onnx_graph) {
+  if (onnx_graph.output_size() == 0) {
+    ErrorManager::GetInstance().ATCReportErrMessage("E16001");
+    GELOGE(FAILED, "[Parse][Output] Onnx graph:%s has zero output", onnx_graph.name().c_str());
+    REPORT_INNER_ERROR("E19999", "Onnx graph:%s has zero output", onnx_graph.name().c_str());
+    return FAILED;
+  }
+
+  // get output value info map
+  for (int i = 0; i < onnx_graph.output_size(); i++) {
+    ge::onnx::ValueInfoProto value_info = onnx_graph.output(i);
+    GELOGI("The index of %d output name : %s.", i, value_info.name().c_str());
+    output_node_names_.emplace_back(value_info.name());
+  }
+  return SUCCESS;
+}
+
+Status OnnxModelParser::ParseInput(const std::map<std::string, ge::onnx::TensorProto> &initializer_name_tensor,
+                                   bool is_subgraph, ge::onnx::GraphProto &onnx_graph) {
+  if (!is_subgraph && onnx_graph.input_size() == 0) {
     ErrorManager::GetInstance().ATCReportErrMessage("E16001");
-    GELOGE(FAILED, "Onnx graph has zero input");
+    GELOGE(FAILED, "[Parse][Input] Root onnx graph:%s has zero input", onnx_graph.name().c_str());
+    REPORT_INNER_ERROR("E19999", "Root onnx graph:%s has zero input", onnx_graph.name().c_str());
     return FAILED;
   }
 
@@ -207,6 +323,11 @@ Status OnnxModelParser::ParseInput(ge::onnx::GraphProto &onnx_graph,
     ge::onnx::AttributeProto *attribute_index = input_node->add_attribute();
     attribute_index->set_name(ge::kAttrNameIndex);
     attribute_index->set_i(data_index++);
+    // add subgraph attr
+    if (is_subgraph) {
+      attribute = input_node->add_attribute();
+      attribute->set_name(ge::kAttrNameIsSubgraphOp);
+    }
     input_node_names_.emplace_back(value_info.name());
   }
   return SUCCESS;
@@ -319,7 +440,8 @@ Status OnnxModelParser::TransNodeToOperator(const ge::onnx::NodeProto *node_prot
   op = ge::OperatorFactory::CreateOperator(node_name, op_type);
   if (op.GetName() != node_name) {
     ErrorManager::GetInstance().ATCReportErrMessage("E16003", {"opname", "optype"}, {node_name, op_type});
-    GELOGE(INTERNAL_ERROR, "IR for op[%s] optype[%s] is not registered.", node_name.c_str(), op_type.c_str());
+    GELOGE(INTERNAL_ERROR, "[Creat][Op] IR for op[%s] optype[%s] is not registered.", node_name.c_str(), op_type.c_str());
+    REPORT_INNER_ERROR("E19999", "IR for op[%s] optype[%s] is not registered.", node_name.c_str(), op_type.c_str());
     return INTERNAL_ERROR;
   }
 
@@ -428,7 +550,8 @@ Status OnnxModelParser::ParseAllNodeProto(ge::onnx::GraphProto &onnx_graph, ge::
     std::string op_type;
     Status status = AdapterOpType(node_proto, ori_type, op_type);
     if (status != SUCCESS) {
-      GELOGE(status, "Adapter op type for ori type %s failed.", ori_type.c_str());
+      GELOGE(status, "[Adapt][OpType] Adapter op type for ori type %s failed.", ori_type.c_str());
+      REPORT_CALL_ERROR("E19999", "Adapter op type for ori type %s failed.", ori_type.c_str());
       return status;
     }
     node_proto->set_op_type(ori_type);
@@ -438,7 +561,8 @@ Status OnnxModelParser::ParseAllNodeProto(ge::onnx::GraphProto &onnx_graph, ge::
     ge::Operator op;
     status = TransNodeToOperator(node_proto, op, op_type);
     if (status != SUCCESS) {
-      GELOGE(status, "Trans node to operator for %s:%s failed.", node_name.c_str(), op_type.c_str());
+      GELOGE(status, "[Trans][Node] Trans node to operator for %s:%s failed.", node_name.c_str(), op_type.c_str());
+      REPORT_CALL_ERROR("E19999", "Trans node to operator for %s:%s failed.", node_name.c_str(), op_type.c_str());
       return status;
     }
 
@@ -455,9 +579,14 @@ Status OnnxModelParser::ParseAllNodeProto(ge::onnx::GraphProto &onnx_graph, ge::
       return status;
     }
 
+    GELOGI("After ParseParams, op[%s]: type[%s] have input size: %zu, output size: %zu", op.GetName().c_str(),
+           op.GetOpType().c_str(), op.GetInputsSize(), op.GetOutputsSize());
+
+
     ge::graphStatus graph_status = graph.AddOp(op);
     if (graph_status != ge::GRAPH_SUCCESS) {
-      GELOGE(FAILED, "Add op:%s to graph failed.", op.GetName().c_str());
+      GELOGE(FAILED, "[Add][Op] Add op:%s to graph failed.", op.GetName().c_str());
+      REPORT_CALL_ERROR("E19999", "Add op:%s to graph failed.", op.GetName().c_str());
       return FAILED;
     }
     name_operator_[op.GetName()] = op;
@@ -473,18 +602,54 @@ Status OnnxModelParser::ParseAllNodeProto(ge::onnx::GraphProto &onnx_graph, ge::
   return SUCCESS;
 }
 
-Status OnnxModelParser::GetGraphInputs(std::vector<ge::Operator> &input_ops) {
+Status OnnxModelParser::GetGraphInputs(ge::onnx::GraphProto &onnx_graph, std::vector<ge::Operator> &input_ops) {
+  if (input_node_names_.empty()) {
+    // subgraph might not have input, we use constant nodes as the start nodes of graph
+    for (int i = 0; i < onnx_graph.node_size(); i++) {
+      ge::onnx::NodeProto *node = onnx_graph.mutable_node(i);
+      if (node->op_type() == kOpTypeConstant) {
+        input_node_names_.emplace_back(node->name());
+      }
+    }
+  }
   for (auto in_name : input_node_names_) {
     auto in_op = name_operator_.find(in_name);
     if (in_op == name_operator_.end()) {
-      GELOGE(PARAM_INVALID, "Model assigned output node name: %s can not find in graph.",
+      GELOGE(PARAM_INVALID, "[Get][Inputs] Model assigned input node name: %s can not find in graph.",
              in_name.c_str());
+      REPORT_INNER_ERROR("E19999", "Model assigned input node name: %s can not find in graph.",
+                         in_name.c_str());
       return PARAM_INVALID;
     }
     input_ops.emplace_back(in_op->second);
     GELOGI("Model assigned input node name: %s", in_op->second.GetName().c_str());
   }
+    return SUCCESS;
+}
 
+Status OnnxModelParser::GetGraphOutputs(std::vector<std::pair<Operator, std::vector<size_t>>> &output_ops) {
+  for (auto output_name : output_node_names_) {
+    auto itr = outputs_map_.find(output_name);
+    if (itr == outputs_map_.end()) {
+      GELOGE(PARAM_INVALID, "[Get][Outputs] Can not find output:%s in graph.", output_name.c_str());
+      REPORT_INNER_ERROR( "E19999", "[Get][Outputs] Can not find output:%s in graph.", output_name.c_str());
+      return PARAM_INVALID;
+    }
+
+    std::vector<std::pair<std::string, int>> node_names_indexes = itr->second;
+    for (const auto &node_name_index : node_names_indexes) {
+      auto node_name = node_name_index.first;
+      auto out_op_itr = name_operator_.find(node_name);
+      if (out_op_itr == name_operator_.end()) {
+        GELOGE(PARAM_INVALID, "[Get][Operator] Can not find operator: %s in graph.", node_name.c_str());
+        REPORT_INNER_ERROR("E19999", "Can not find operator: %s in graph.", node_name.c_str());
+        return PARAM_INVALID;
+      }
+      int index = node_name_index.second;
+      output_ops.emplace_back(out_op_itr->second, vector<size_t>{static_cast<size_t>(index)});
+      GELOGI("out node index %d, node:%s", index, node_name.c_str());
+    }
+  }
   return SUCCESS;
 }
 
@@ -515,19 +680,146 @@ Status OnnxModelParser::GetModelFromMemory(const char *data, uint32_t size, ge::
   return SUCCESS;
 }
 
-Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model, ge::Graph &graph) {
+void OnnxModelParser::ClearMembers() {
+  name_operator_.clear();
+  input_node_names_.clear();
+  output_node_names_.clear();
+  inputs_map_.clear();
+  outputs_map_.clear();
+}
+
+Status OnnxModelParser::AdaptAndFindAllOnnxGraph(ge::onnx::GraphProto &root_onnx_graph,
+                                                 std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph) {
+  std::queue<ge::onnx::GraphProto *> onnx_graph_tasks;
+  int index = 0;
+  onnx_graph_tasks.push(&root_onnx_graph);
+
+  while (!onnx_graph_tasks.empty()) {
+    ge::onnx::GraphProto *onnx_graph = onnx_graph_tasks.front();
+    onnx_graph_tasks.pop();
+    for (int i = 0; i < onnx_graph->node_size(); i++) {
+      ge::onnx::NodeProto *node_proto = onnx_graph->mutable_node(i);
+      if (node_proto->name().empty()) {
+        std::string node_name = node_proto->op_type() + "_" + to_string(index++);
+        node_proto->set_name(node_name);
+      }
+      GELOGD("adapt op name:%s, op type:%s", node_proto->name().c_str(), node_proto->op_type().c_str());
+
+      SubgraphAdapterFactory *factory = SubgraphAdapterFactory::Instance();
+      GE_CHECK_NOTNULL(factory);
+      std::shared_ptr<SubgraphAdapter> subgraph_adapter = factory->CreateSubgraphAdapter(node_proto->op_type());
+      if(subgraph_adapter == nullptr) {
+        GELOGD("Do not need adapt subgraph, op type:%s", node_proto->op_type().c_str());
+        continue;
+      }
+      std::vector<ge::onnx::GraphProto *> onnx_graphs;
+      std::map<std::string, ge::onnx::GraphProto *> name_to_onnx_subgraph;
+      if (subgraph_adapter->AdaptAndFindAllSubgraphs(node_proto, onnx_graphs, name_to_onnx_subgraph) != SUCCESS) {
+        GELOGE(FAILED, "[Adapt][Subgraph] adapt subgraph of node:%s failed.", node_proto->name().c_str());
+        REPORT_INNER_ERROR("E19999", "adapt subgraph of node:%s failed.", node_proto->name().c_str());
+        return FAILED;
+      }
+
+      for (const auto &onnx_graph : onnx_graphs) {
+        onnx_graph_tasks.push(onnx_graph);
+      }
+      for (const auto &itr : name_to_onnx_subgraph) {
+        name_to_onnx_graph.emplace(itr.first, itr.second);
+      }
+    }
+  }
+  return SUCCESS;
+}
+
+Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model, ge::Graph &root_graph) {
   if (!onnx_model.has_graph()) {
     ErrorManager::GetInstance().ATCReportErrMessage("E16004");
     GELOGE(PARAM_INVALID, "Onnx model do not has graph.");
     return FAILED;
   }
-  ge::onnx::GraphProto onnx_graph = onnx_model.graph();
+  std::map<std::string, ge::onnx::GraphProto *> name_to_onnx_graph;
+  std::deque<ParseArg> tasks;
+  ge::onnx::GraphProto root_onnx_graph = onnx_model.graph();
+
+  auto ret = AdaptAndFindAllOnnxGraph(root_onnx_graph, name_to_onnx_graph);
+  if (ret != SUCCESS) {
+    GELOGE(FAILED, "[AdaptAndFind][OnnxGraph]adapt and find all onnx graph failed, root graph:%s.",
+           root_onnx_graph.name().c_str());
+    return FAILED;
+  }
 
   auto opset_import = onnx_model.opset_import();
   for (auto it : opset_import) {
     domain_verseion_[it.domain()] = it.version();
     GELOGI("Domain: %s, Version: %ld ", it.domain().c_str(), it.version());
   }
+  std::string root_graph_name = root_graph.GetName().empty() ? "default_graph" : root_graph.GetName();
+  tasks.push_back({&root_onnx_graph, nullptr, root_graph_name, 0});
+
+  while (!tasks.empty()) {
+    ParseArg arg = tasks.front();
+    tasks.pop_front();
+    bool is_subgraph = (arg.parent_node != nullptr) ? true : false;
+
+    if (arg.onnx_graph == nullptr) {
+      auto itr = name_to_onnx_graph.find(arg.graph_name);
+      if (itr == name_to_onnx_graph.end()) {
+        GELOGE(FAILED, "[Find][OnnxGraph] Can not find onnx graph, graph:%s.", arg.graph_name.c_str());
+        REPORT_INNER_ERROR("E19999", "Can not find onnx graph, graph:%s.", arg.graph_name.c_str());
+        return FAILED;
+      }
+      arg.onnx_graph = itr->second;
+    }
+
+    ge::onnx::GraphProto *onnx_graph = arg.onnx_graph;
+    ge::Graph tmp_graph(arg.graph_name);
+    ret = ModelParseToGraphImpl(is_subgraph, *onnx_graph, tmp_graph);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[Parse][Model] Model parse to graph failed, graph name:%s.", arg.graph_name.c_str());
+      REPORT_INNER_ERROR("E19999", "Model parse to graph failed, graph name:%s.", arg.graph_name.c_str());
+      return ret;
+    }
+    // To get the result for root graph
+    if (!is_subgraph) {
+      root_graph = tmp_graph;
+    }
+
+    ge::ComputeGraphPtr cur_compute_graph = ge::GraphUtils::GetComputeGraph(tmp_graph);
+    GE_CHECK_NOTNULL(cur_compute_graph);
+
+    ret = PostOpProcessForSubgraph(arg, cur_compute_graph);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[PostProcess][Subgraph]Post Op for subgraph:%s failed.", cur_compute_graph->GetName().c_str());
+      REPORT_CALL_ERROR("E19999", "Post Op for subgraph:%s failed.", cur_compute_graph->GetName().c_str());
+      return ret;
+    }
+
+    ret = BuildLinkForChildAndParentGraph(cur_compute_graph, arg);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[BuildLink][Graph] Build link for child graph:%s and parent graph failed.",
+             cur_compute_graph->GetName().c_str());
+      REPORT_CALL_ERROR("E19999", "Build link for child graph:%s and parent graph failed.",
+                        cur_compute_graph->GetName().c_str());
+      return ret;
+    }
+
+    ret = GenSubgraphParseTasks(cur_compute_graph, tasks);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[Generate][Task] Failed to gen tasks on graph %s for next iteration",
+             cur_compute_graph->GetName().c_str());
+      REPORT_CALL_ERROR("E19999", "Failed to gen tasks on graph %s for next iteration",
+                        cur_compute_graph->GetName().c_str());
+      return ret;
+    }
+
+  }
+  UpdateDataFormat(root_graph);
+  return SUCCESS;
+}
+
+Status OnnxModelParser::ModelParseToGraphImpl(bool is_subgraph, ge::onnx::GraphProto &onnx_graph, ge::Graph &graph) {
+
+  ClearMembers();
 
   // 2. Get all inializer.
   std::map<std::string, ge::onnx::TensorProto> initializer_name_tensor;
@@ -541,7 +833,8 @@ Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model
 
   // 3. Parse Input from graph.
   GELOGI("The size of initializer_name_tensor is %zu ", initializer_name_tensor.size());
-  Status ret = ParseInput(onnx_graph, initializer_name_tensor);
+
+  Status ret = ParseInput(initializer_name_tensor, is_subgraph, onnx_graph);
   if (ret != SUCCESS) {
     GELOGE(ret, "Parse input for onnx failed.");
     return ret;
@@ -555,6 +848,12 @@ Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model
     return ret;
   }
 
+  ret = ParseOutput(onnx_graph);
+  if (ret != SUCCESS) {
+    GELOGE(ret, "[Parse][Output] Parse output for onnx failed.");
+    return ret;
+  }
+
   // 5. Update node name for node do not has name.
   ret = UpdateAllNodeName(onnx_graph);
   if (ret != SUCCESS) {
@@ -582,6 +881,10 @@ Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model
     return ret;
   }
 
+  std::vector<string> op_names;
+  graph.GetAllOpName(op_names);
+  GELOGI("After trans node to operator, graph has the size of operator is %zu.", op_names.size());
+
   // 8. Set all operator input.
   ret = SetOperatorInputs();
   if (ret != SUCCESS) {
@@ -589,22 +892,27 @@ Status OnnxModelParser::ModelParseToGraph(const ge::onnx::ModelProto &onnx_model
     return ret;
   }
 
-  std::vector<string> op_names;
-  graph.GetAllOpName(op_names);
-  GELOGI("After trans node to operator, graph has the size of operator is %zu.", op_names.size());
-
   // 9. Construct graph.
   std::vector<ge::Operator> input_ops;
-
-  ret = GetGraphInputs(input_ops);
+  ret = GetGraphInputs(onnx_graph, input_ops);
   if (ret != SUCCESS) {
     GELOGE(ret, "Get graph inputs failed.");
     return ret;
   }
   graph.SetInputs(input_ops);
 
+  // root graph needn't set outputs.
+  if(is_subgraph) {
+    std::vector<std::pair<Operator, std::vector<size_t>>> output_ops;
+    ret = GetGraphOutputs(output_ops);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[Get][Outputs]Get graph outputs failed.");
+      return ret;
+    }
+    graph.SetOutputs(output_ops);
+  }
+
   GE_RETURN_IF_ERROR(ParserUtils::ExpandOneToManyGraph(graph));
-  UpdateDataFormat(graph);
 
   GELOGI("Onnx model parser success.");
   return SUCCESS;
diff --git a/parser/onnx/onnx_parser.h b/parser/onnx/onnx_parser.h
index 45adf7c..b28494b 100644
--- a/parser/onnx/onnx_parser.h
+++ b/parser/onnx/onnx_parser.h
@@ -72,8 +72,10 @@ class PARSER_FUNC_VISIBILITY OnnxModelParser : public domi::ModelParser {
  private:
   Status ParseAllNodeProto(ge::onnx::GraphProto &onnx_graph, ge::Graph &graph);
 
-  Status ParseInput(ge::onnx::GraphProto &onnx_graph,
-                    std::map<std::string, ge::onnx::TensorProto> &initializer_name_tensor);
+  Status ParseInput(const std::map<std::string, ge::onnx::TensorProto> &initializer_name_tensor,
+                    bool is_subgraph, ge::onnx::GraphProto &onnx_graph);
+
+  Status ParseOutput(ge::onnx::GraphProto &onnx_graph);
 
   Status ParseInitializer(ge::onnx::GraphProto &onnx_graph,
                           std::map<std::string, ge::onnx::TensorProto> &initializer_name_tensor);
@@ -90,7 +92,9 @@ class PARSER_FUNC_VISIBILITY OnnxModelParser : public domi::ModelParser {
 
   Status SetOperatorInputs();
 
-  Status GetGraphInputs(std::vector<ge::Operator> &input_ops);
+  Status GetGraphInputs(ge::onnx::GraphProto &onnx_graph, std::vector<ge::Operator> &input_ops);
+
+  Status GetGraphOutputs(std::vector<std::pair<Operator, std::vector<size_t>>> &outputs);
 
   Status Prechecker(ge::onnx::GraphProto &onnx_graph);
   
@@ -100,8 +104,15 @@ class PARSER_FUNC_VISIBILITY OnnxModelParser : public domi::ModelParser {
 
   Status ModelParseToGraph(const ge::onnx::ModelProto &onnx_model, ge::Graph &graph);
 
+  Status ModelParseToGraphImpl(bool is_subgraph, ge::onnx::GraphProto &onnx_graph, ge::Graph &graph);
+
   void UpdateDataFormat(ge::Graph &graph);
 
+  void ClearMembers();
+
+  Status AdaptAndFindAllOnnxGraph(ge::onnx::GraphProto &root_onnx_graph,
+                                  std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph);
+
   std::map<std::string, std::string> ori_to_om_type_;
 
   std::map<std::string, int64_t> domain_verseion_;
@@ -110,6 +121,8 @@ class PARSER_FUNC_VISIBILITY OnnxModelParser : public domi::ModelParser {
 
   std::vector<std::string> input_node_names_;
 
+  std::vector<std::string> output_node_names_;
+
   std::map<std::string, std::vector<std::pair<std::string, int>>> inputs_map_;
 
   std::map<std::string, std::vector<std::pair<std::string, int>>> outputs_map_;
diff --git a/parser/onnx/onnx_util.cc b/parser/onnx/onnx_util.cc
index d42ab39..72ba260 100644
--- a/parser/onnx/onnx_util.cc
+++ b/parser/onnx/onnx_util.cc
@@ -60,4 +60,9 @@ int64_t OnnxUtil::CaculateDataSize(int64_t onnx_data_type) {
     return ge::DataType::DT_UNDEFINED;
   }
 }
+
+void OnnxUtil::GenUniqueSubgraphName(int subgraph_index, const std::string &original_subgraph_name,
+                                     const std::string &parent_node_name, std::string &unique_subgraph_name) {
+  unique_subgraph_name = parent_node_name + "_" + std::to_string(subgraph_index) + "_" + original_subgraph_name;
+}
 }  // namespace ge
diff --git a/parser/onnx/onnx_util.h b/parser/onnx/onnx_util.h
index 259ed42..c8ffa8c 100644
--- a/parser/onnx/onnx_util.h
+++ b/parser/onnx/onnx_util.h
@@ -45,6 +45,7 @@ namespace ge {
 const char *const kAttrNameValue = "value";
 const char *const kAttrNameInput = "input_tensor";
 const char *const kAttrNameIndex = "index";
+const char *const kAttrNameIsSubgraphOp = "is_subgraph_op";
 const char *const kOpTypeConstant = "Constant";
 const char *const kOpTypeInput = "Input";
 
@@ -52,6 +53,8 @@ class OnnxUtil {
  public:
   static ge::DataType ConvertOnnxDataType(int64_t onnx_data_type);
   static int64_t CaculateDataSize(int64_t onnx_data_type);
+  static void GenUniqueSubgraphName(int subgraph_index, const std::string &original_subgraph_name,
+                                    const std::string &parent_node_name, std::string &unique_subgraph_name);
 };
 }  // namespace ge
 
diff --git a/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc b/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc
new file mode 100644
index 0000000..0265ed2
--- /dev/null
+++ b/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc
@@ -0,0 +1,131 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "if_subgraph_adapter.h"
+#include "subgraph_adapter_factory.h"
+#include "common/util.h"
+#include "framework/common/debug/ge_log.h"
+
+namespace ge{
+namespace {
+const std::map<std::string, int> kAttrNameToIndex = {{"then_branch", 0}, {"else_branch", 1}};
+const int kIfNodeAttrSize = 2;
+}
+Status IfSubgraphAdapter::AdaptAndFindAllSubgraphs(ge::onnx::NodeProto *parent_node,
+    std::vector<ge::onnx::GraphProto *> &onnx_graphs,
+    std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph) {
+  GE_CHECK_NOTNULL(parent_node);
+  GELOGI("Onnx parent node name=%s, op type=%s, adapt subgraph.", parent_node->name().c_str(),
+         parent_node->op_type().c_str());
+
+  auto ret = ParseIfNodeSubgraphs(parent_node, onnx_graphs, name_to_onnx_graph);
+  if (ret != SUCCESS) {
+    GELOGE(ret, "[Parse][Node] Parse if node failed.");
+    REPORT_CALL_ERROR("E19999", "[Parse][Node] Parse if node:%s failed.", parent_node->name().c_str());
+    return ret;
+  }
+
+  return SUCCESS;
+}
+
+Status IfSubgraphAdapter::ParseIfNodeSubgraphs(ge::onnx::NodeProto *parent_node,
+                                               std::vector<ge::onnx::GraphProto *> &onnx_graphs,
+                                               std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph) {
+  if (parent_node->attribute_size() != kIfNodeAttrSize) {
+    GELOGE(FAILED, "[Parse][Node] Invalid graph, if node attribute size:%d must be 2.", parent_node->attribute_size());
+    REPORT_INNER_ERROR("E19999", "Invalid graph, if node attribute size:%d must be 2.", parent_node->attribute_size());
+    return FAILED;
+  }
+
+  GELOGD("node attribute size:%d.", parent_node->attribute_size());
+  std::set<std::string> all_inputs;
+  // for onnx graph, the first attribute may be else branch and the second attribute may be then branch
+  for (int i = 0; i < parent_node->attribute_size(); i++) {
+    ge::onnx::AttributeProto *attribute = parent_node->mutable_attribute(i);
+    GE_CHECK_NOTNULL(attribute);
+    std::string attr_name = attribute->name();
+    auto itr = kAttrNameToIndex.find(attr_name);
+    if (itr == kAttrNameToIndex.end()) {
+      GELOGE(FAILED, "[Parse][Attribute] Invalid attribute name:%s, it should be then_branch or else_branch.",
+             attr_name.c_str());
+      REPORT_INNER_ERROR("E19999", "Invalid attribute name:%s, it should be then_branch or else_branch.",
+                         attr_name.c_str());
+      return FAILED;
+    }
+    std::string unique_subgraph_name;
+    OnnxUtil::GenUniqueSubgraphName(itr->second, itr->first, parent_node->name(), unique_subgraph_name);
+    GELOGI("Adapt if node attribute:%s, subgraph name:%s.", attr_name.c_str(), unique_subgraph_name.c_str());
+    ge::onnx::GraphProto *onnx_graph = attribute->mutable_g();
+    name_to_onnx_graph[unique_subgraph_name] = onnx_graph;
+    onnx_graphs.emplace_back(onnx_graph);
+
+    auto ret = GetSubgraphsAllInputs(*onnx_graph, all_inputs);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "[Get][Inputs] Get subgraph all inputs failed, attr_name:%s.", attr_name.c_str());
+      REPORT_INNER_ERROR("E19999", "Get subgraph all inputs failed, attr_name:%s.", attr_name.c_str());
+      return ret;
+    }
+  }
+
+  for (auto &onnx_graph : onnx_graphs) {
+    AddInputNodeForGraph(all_inputs, *onnx_graph);
+  }
+
+  AddInputForParentNode(all_inputs, *parent_node);
+  return SUCCESS;
+}
+
+Status IfSubgraphAdapter::GetSubgraphsAllInputs(ge::onnx::GraphProto &onnx_graph,
+                                                std::set<std::string> &all_inputs) {
+  std::set<std::string> graph_inputs;
+  std::set<std::string> graph_outputs;
+  for (int i = 0; i < onnx_graph.node_size(); i++) {
+    ge::onnx::NodeProto *node_proto = onnx_graph.mutable_node(i);
+    for (int j = 0; j < node_proto->input_size(); j++) {
+      graph_inputs.emplace(node_proto->input(j));
+    }
+    for (int j = 0; j < node_proto->output_size(); j++) {
+      graph_outputs.emplace(node_proto->output(j));
+    }
+  }
+
+  for (const auto &input : graph_inputs) {
+    auto out_iter = graph_outputs.find(input);
+    if (out_iter == graph_outputs.end()) {
+      // Record input node need to be constructed
+      all_inputs.emplace(input);
+    }
+  }
+
+  return SUCCESS;
+}
+
+void IfSubgraphAdapter::AddInputNodeForGraph(const std::set<std::string> &all_inputs,
+                                             ge::onnx::GraphProto &onnx_graph) {
+  for (const auto &input_name : all_inputs) {
+    ge::onnx::ValueInfoProto *value_info = onnx_graph.add_input();
+    value_info->set_name(input_name);
+  }
+}
+
+void IfSubgraphAdapter::AddInputForParentNode(const std::set<std::string> &all_inputs,
+                                              ge::onnx::NodeProto &parent_node) {
+  for (const auto &input_name : all_inputs) {
+    parent_node.add_input(input_name);
+  }
+}
+REGISTER_SUBGRAPH_ADAPTER_CREATOR(IF, IfSubgraphAdapter);
+}  // namespace ge
diff --git a/parser/onnx/subgraph_adapter/if_subgraph_adapter.h b/parser/onnx/subgraph_adapter/if_subgraph_adapter.h
new file mode 100644
index 0000000..103a937
--- /dev/null
+++ b/parser/onnx/subgraph_adapter/if_subgraph_adapter.h
@@ -0,0 +1,40 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GE_PARSER_ONNX_SUBGRAPH_ADAPTER_IF_SUBGRAPH_ADAPTER_H_
+#define GE_PARSER_ONNX_SUBGRAPH_ADAPTER_IF_SUBGRAPH_ADAPTER_H_
+
+#include <set>
+#include <string>
+#include "subgraph_adapter.h"
+
+using ge::onnx::NodeProto;
+
+namespace ge {
+class PARSER_FUNC_VISIBILITY IfSubgraphAdapter : public SubgraphAdapter {
+ public:
+  Status AdaptAndFindAllSubgraphs(ge::onnx::NodeProto *parent_op, std::vector<ge::onnx::GraphProto *> &onnx_graphs,
+                                  std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph) override;
+private:
+  Status ParseIfNodeSubgraphs(ge::onnx::NodeProto *parent_node, std::vector<ge::onnx::GraphProto *> &onnx_graphs,
+                              std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph);
+  Status GetSubgraphsAllInputs(ge::onnx::GraphProto &onnx_graph, std::set<std::string> &all_inputs);
+  void AddInputNodeForGraph(const std::set<std::string> &all_inputs, ge::onnx::GraphProto &onnx_graph);
+  void AddInputForParentNode(const std::set<std::string> &all_inputs, ge::onnx::NodeProto &parent_node);
+};
+}  // namespace ge
+
+#endif  // GE_PARSER_ONNX_SUBGRAPH_ADAPTER_IF_SUBGRAPH_ADAPTER_H_
diff --git a/parser/onnx/subgraph_adapter/subgraph_adapter.h b/parser/onnx/subgraph_adapter/subgraph_adapter.h
new file mode 100644
index 0000000..afb2f96
--- /dev/null
+++ b/parser/onnx/subgraph_adapter/subgraph_adapter.h
@@ -0,0 +1,61 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_H_
+#define GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_H_
+
+#if defined(_MSC_VER)
+#ifdef FUNC_VISIBILITY
+#define PARSER_FUNC_VISIBILITY _declspec(dllexport)
+#else
+#define PARSER_FUNC_VISIBILITY
+#endif
+#else
+#ifdef FUNC_VISIBILITY
+#define PARSER_FUNC_VISIBILITY __attribute__((visibility("default")))
+#else
+#define PARSER_FUNC_VISIBILITY
+#endif
+#endif
+
+#include <map>
+#include <vector>
+#include "proto/onnx/ge_onnx.pb.h"
+#include "external/register/register_error_codes.h"
+#include "framework/omg/parser/parser_types.h"
+#include "onnx_util.h"
+
+using Status = domi::Status;
+using namespace ge::parser;
+
+namespace ge {
+class PARSER_FUNC_VISIBILITY SubgraphAdapter {
+ public:
+  /// @brief parse params
+  /// @param [in/out] parent_op               parent op
+  /// @param [in/out] onnx_graph_tasks        onnx graph task
+  /// @param [in/out] name_to_onnx_graph      map name to onnx graph
+  /// @return SUCCESS                         parse success
+  /// @return FAILED                          Parse failed
+  virtual Status AdaptAndFindAllSubgraphs(ge::onnx::NodeProto *parent_op,
+                                          std::vector<ge::onnx::GraphProto *> &onnx_graphs,
+                                          std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph) {
+    return domi::SUCCESS;
+  }
+};
+}  // namespace ge
+
+#endif  // GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_H_
diff --git a/parser/onnx/subgraph_adapter/subgraph_adapter_factory.cc b/parser/onnx/subgraph_adapter/subgraph_adapter_factory.cc
new file mode 100644
index 0000000..7632520
--- /dev/null
+++ b/parser/onnx/subgraph_adapter/subgraph_adapter_factory.cc
@@ -0,0 +1,45 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "subgraph_adapter_factory.h"
+#include "framework/common/debug/ge_log.h"
+
+namespace ge{
+SubgraphAdapterFactory* SubgraphAdapterFactory::Instance() {
+  static SubgraphAdapterFactory instance;
+  return &instance;
+}
+
+std::shared_ptr<SubgraphAdapter> SubgraphAdapterFactory::CreateSubgraphAdapter(
+    const std::string &op_type) {
+  // First look for CREATOR_FUN based on OpType, then call CREATOR_FUN to create SubgraphAdapter.
+  auto iter = subgraph_adapter_creator_map_.find(op_type);
+  if (iter != subgraph_adapter_creator_map_.end()) {
+    return iter->second();
+  }
+
+  GELOGW("SubgraphAdapterFactory::CreateSubgraphAdapter: Not supported type: %s", op_type.c_str());
+  return nullptr;
+}
+
+// This function is only called within the constructor of the global SubgraphAdapterRegisterar object,
+// and does not involve concurrency, so there is no need to lock it
+void SubgraphAdapterFactory::RegisterCreator(const std::string &type, CREATOR_FUN fun) {
+  std::map<std::string, CREATOR_FUN> *subgraph_adapter_creator_map = &subgraph_adapter_creator_map_;
+  GELOGD("SubgraphAdapterFactory::RegisterCreator: op type:%s.", type.c_str());
+  (*subgraph_adapter_creator_map)[type] = fun;
+}
+}  // namespace ge
diff --git a/parser/onnx/subgraph_adapter/subgraph_adapter_factory.h b/parser/onnx/subgraph_adapter/subgraph_adapter_factory.h
new file mode 100644
index 0000000..fa023fa
--- /dev/null
+++ b/parser/onnx/subgraph_adapter/subgraph_adapter_factory.h
@@ -0,0 +1,119 @@
+/**
+ * Copyright 2020 Huawei Technologies Co., Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_FACTORY_H_
+#define GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_FACTORY_H_
+
+#if defined(_MSC_VER)
+#ifdef FUNC_VISIBILITY
+#define PARSER_FUNC_VISIBILITY _declspec(dllexport)
+#else
+#define PARSER_FUNC_VISIBILITY
+#endif
+#else
+#ifdef FUNC_VISIBILITY
+#define PARSER_FUNC_VISIBILITY __attribute__((visibility("default")))
+#else
+#define PARSER_FUNC_VISIBILITY
+#endif
+#endif
+
+#include <map>
+#include <functional>
+#include "subgraph_adapter.h"
+
+namespace ge {
+/**
+ * @brief Used to create OpParser
+ *
+ */
+class PARSER_FUNC_VISIBILITY SubgraphAdapterFactory {
+public:
+  /**
+   * @brief Returns the SubgraphAdapterFactory instance
+   * @return SubgraphAdapterFactory object
+   */
+  static SubgraphAdapterFactory* Instance();
+
+  /**
+   * @brief Create SubgraphAdapter based on input type
+   * @param [in] op_type Op type
+   * @return Created SubgraphAdapter
+   */
+  std::shared_ptr<SubgraphAdapter> CreateSubgraphAdapter(const std::string &op_type);
+
+
+protected:
+  /**
+   * @brief SubgraphAdapter creation function
+   * @return Created SubgraphAdapter
+   */
+  // typedef shared_ptr<SubgraphAdapter> (*CREATOR_FUN)(void);
+  using CREATOR_FUN = std::function<std::shared_ptr<SubgraphAdapter>(void)>;
+
+  /**
+   * @brief Factory instances can only be created automatically, not new methods, so the constructor is not public.
+   */
+  SubgraphAdapterFactory() {}
+
+  /**
+   * @brief Register creation function
+   * @param [in] type Op type
+   * @param [in] fun OpParser creation function
+   */
+  void RegisterCreator(const std::string &type, CREATOR_FUN fun);
+
+private:
+  std::map<std::string, CREATOR_FUN> subgraph_adapter_creator_map_;  // lint !e1073
+
+  friend class SubgraphAdapterRegisterar;
+};
+
+/**
+ * @brief For registering Creator functions for different types of subgraph adapter
+ *
+ */
+class PARSER_FUNC_VISIBILITY SubgraphAdapterRegisterar {
+public:
+  /**
+   * @brief Constructor
+   * @param [in] op_type      Op type
+   * @param [in] fun          Creator function corresponding to Subgrap adapter
+   */
+  SubgraphAdapterRegisterar(const std::string &op_type, SubgraphAdapterFactory::CREATOR_FUN fun) {
+    SubgraphAdapterFactory::Instance()->RegisterCreator(op_type, fun);
+  }
+  ~SubgraphAdapterRegisterar() {}
+};
+
+/**
+ * @brief SubgraphAdapter Registration Macro
+ * @param [in] op_type      Op type
+ * @param [in] clazz        SubgraphAdapter implementation class
+ */
+#define REGISTER_SUBGRAPH_ADAPTER_CREATOR(op_type, clazz)                       \
+  std::shared_ptr<SubgraphAdapter> Creator_##op_type##_Subgraph_Adapter() {     \
+    std::shared_ptr<clazz> ptr(new (std::nothrow) clazz());                     \
+    if (ptr == nullptr) {                                                       \
+      GELOGW("MakeShared failed, result is nullptr.");                          \
+    }                                                                           \
+    return std::shared_ptr<SubgraphAdapter>(ptr);                               \
+  }                                                                             \
+  ge::SubgraphAdapterRegisterar g_##op_type##_Subgraph_Adapter_Creator(op_type, \
+                                                                       Creator_##op_type##_Subgraph_Adapter)
+}  // namespace ge
+
+#endif  // GE_PARSER_ONNX_SUBGRAPH_ADAPTER_SUBGRAPH_ADAPTER_FACTORY_H_