diff --git a/ge/graph/load/model_manager/davinci_model.cc b/ge/graph/load/model_manager/davinci_model.cc
index 580394ec..c6bfe8eb 100755
--- a/ge/graph/load/model_manager/davinci_model.cc
+++ b/ge/graph/load/model_manager/davinci_model.cc
@@ -859,6 +859,8 @@ Status DavinciModel::InitNodes(const ComputeGraphPtr &compute_graph) {
       continue;
     }
 
+    // for dynamic shape with control flow
+    SetLabelForDynamic(node);
     auto it = op_desc_handle.find(op_desc->GetType());
     if (it != op_desc_handle.end()) {
       if ((this->*it->second)(op_desc) != SUCCESS) {
@@ -867,8 +869,6 @@ Status DavinciModel::InitNodes(const ComputeGraphPtr &compute_graph) {
       }
       continue;
     }
-    // for dynamic shape with control flow
-    SetLabelForDynamic(node);
     if (IsNoTaskAndDumpNeeded(op_desc)) {
       GELOGD("node[%s] without task, and save op_desc and addr for dump", op_desc->GetName().c_str());
       const RuntimeParam &rts_param = GetRuntimeParam();
@@ -910,14 +910,14 @@ Status DavinciModel::InitNodes(const ComputeGraphPtr &compute_graph) {
 }
 
 void DavinciModel::SetLabelForDynamic(const NodePtr &node) {
-  if (known_node_ && node->GetOpDesc()->GetType() == LABELSWITCHBYINDEX) {
+  if (known_node_ && (node->GetType() == LABELSWITCHBYINDEX || node->GetType() == STREAMSWITCH)) {
     for (auto &in_data_anchor : node->GetAllInDataAnchors()) {
       auto peer_out_data_anchor = in_data_anchor->GetPeerOutAnchor();
       if (peer_out_data_anchor != nullptr) {
-        string tensor_name = node->GetName();
+        // name+index as the label of switch input
+        string tensor_name = node->GetName() + std::to_string(in_data_anchor->GetIdx());
         auto peer_node = peer_out_data_anchor->GetOwnerNode();
         (void)AttrUtils::SetStr(peer_node->GetOpDesc(), ATTR_DYNAMIC_SHAPE_FIXED_ADDR, tensor_name);
-        (void)AttrUtils::SetInt(peer_node->GetOpDesc(), ATTR_DYNAMIC_SHAPE_FIXED_ADDR_INDEX, 0);
         tensor_name_to_peer_output_index_[tensor_name] = 0;
       }
     }
diff --git a/ge/graph/load/model_manager/task_info/stream_switch_task_info.cc b/ge/graph/load/model_manager/task_info/stream_switch_task_info.cc
index f129950a..f51c154c 100644
--- a/ge/graph/load/model_manager/task_info/stream_switch_task_info.cc
+++ b/ge/graph/load/model_manager/task_info/stream_switch_task_info.cc
@@ -123,7 +123,7 @@ Status StreamSwitchTaskInfo::CalculateArgs(const domi::TaskDef &task_def, Davinc
     return FAILED;
   }
   for (uint32_t i = 0; i < STREAM_SWITCH_INPUT_NUM; ++i) {
-    string input_tensor_name = op_desc->GetInputNameByIndex(i);
+    string input_tensor_name = op_desc->GetName() + std::to_string(i);
     int64_t fixed_addr_offset = davinci_model->GetFixedAddrsSize(input_tensor_name);
     fixed_addr_offset_.emplace_back(fixed_addr_offset);
     auto tensor_desc = op_desc->GetInputDesc(i);
diff --git a/ge/graph/passes/memcpy_addr_async_pass.cc b/ge/graph/passes/memcpy_addr_async_pass.cc
index b930f7cb..1f6ed4bb 100755
--- a/ge/graph/passes/memcpy_addr_async_pass.cc
+++ b/ge/graph/passes/memcpy_addr_async_pass.cc
@@ -25,7 +25,17 @@
 namespace ge {
 Status MemcpyAddrAsyncPass::Run(ComputeGraphPtr graph) {
   GE_CHECK_NOTNULL(graph);
+
   if (graph->GetGraphUnknownFlag()) {
+    // insert memcpyasync node when parent is unknown graph
+    for (const auto &node : graph->GetAllNodes()) {
+      if (node->GetType() == STREAMSWITCH) {
+        auto sub_graph = node->GetOwnerComputeGraph();
+        if (sub_graph != nullptr && !sub_graph->GetGraphUnknownFlag()) {
+          GE_CHK_STATUS_RET(AddMemcpyAsyncNode(node), "Add memcpyasync node failed in known subgraph.");
+        }
+      }
+    }
     GELOGD("Graph[%s] is unknown graph, skip.", graph->GetName().c_str());
     return SUCCESS;
   }
@@ -63,6 +73,26 @@ Status MemcpyAddrAsyncPass::Run(ComputeGraphPtr graph) {
   return SUCCESS;
 }
 
+Status MemcpyAddrAsyncPass::AddMemcpyAsyncNode(const NodePtr &node) {
+  GELOGI("Start add memcpyasync node in front of node %s", node->GetName().c_str());
+  auto sub_graph = node->GetOwnerComputeGraph();
+  for (InDataAnchorPtr &in_data_anchor : node->GetAllInDataAnchors()) {
+    OutDataAnchorPtr peer_out_anchor = in_data_anchor->GetPeerOutAnchor();
+    GE_IF_BOOL_EXEC(peer_out_anchor == nullptr, continue);
+    auto memcpy_async_node = CreateMemcpyAsyncNode(sub_graph, peer_out_anchor, node);
+    if (memcpy_async_node == nullptr) {
+      GELOGE(INTERNAL_ERROR, "Create memcpyasync node failed.");
+      return INTERNAL_ERROR;
+    }
+    Status ret = InsertMemcpyAddrAsyncNode(peer_out_anchor, in_data_anchor, memcpy_async_node);
+    if (ret != SUCCESS) {
+      GELOGE(ret, "Insert memcpyasync node failed.");
+      return ret;
+    }
+  }
+  return SUCCESS;
+}
+
 Status MemcpyAddrAsyncPass::AddMemcpyAddrAsyncNode(const ComputeGraphPtr &graph, const NodePtr &node) {
   GELOGI("Start AddMemcpyAddrAsyncNode for %s.", node->GetName().c_str());
   for (InDataAnchorPtr &in_data_anchor : node->GetAllInDataAnchors()) {
@@ -256,6 +286,35 @@ NodePtr MemcpyAddrAsyncPass::CreateMemcpyAddrAsyncNode(const ComputeGraphPtr &gr
   return memcpy_addr_async_node;
 }
 
+// create memcpy async node for known sub graph
+NodePtr MemcpyAddrAsyncPass::CreateMemcpyAsyncNode(const ComputeGraphPtr &graph,
+                                                   const OutDataAnchorPtr &out_data_anchor,
+                                                   const NodePtr &out_of_user_data) {
+  GELOGD("Start CreateMemcpyAsyncNode.");
+  static uint32_t new_node_index = 0;
+  OpDescPtr pre_op_desc = out_data_anchor->GetOwnerNode()->GetOpDesc();
+  GE_CHK_BOOL_EXEC(pre_op_desc != nullptr, return nullptr, "Op_desc of pre node is invalid.");
+
+  string node_name = pre_op_desc->GetName() + "_" + MEMCPYASYNC + "_" + std::to_string(new_node_index++);
+  OpDescPtr op_desc = MakeShared<OpDesc>(node_name, MEMCPYASYNC);
+  GE_CHECK_NOTNULL_EXEC(op_desc, return nullptr);
+
+  if (op_desc->AddInputDesc(pre_op_desc->GetOutputDesc(out_data_anchor->GetIdx())) != GRAPH_SUCCESS) {
+    GELOGE(INTERNAL_ERROR, "Add memcpyasync input desc failed.");
+    return nullptr;
+  }
+
+  if (op_desc->AddOutputDesc(pre_op_desc->GetOutputDesc(out_data_anchor->GetIdx())) != GRAPH_SUCCESS) {
+    GELOGE(INTERNAL_ERROR, "Add memcpyasync output desc failed.");
+    return nullptr;
+  }
+
+  NodePtr memcpy_async_node = graph->AddNode(op_desc);
+  GE_CHECK_NOTNULL_EXEC(memcpy_async_node, return nullptr);
+
+  return memcpy_async_node;
+}
+
 Status MemcpyAddrAsyncPass::InsertMemcpyAddrAsyncNode(const OutDataAnchorPtr &out_anchor,
                                                       const InDataAnchorPtr &in_anchor, const NodePtr &node) {
   // insert memcpy_addr of each user_data and out_of_user_data
diff --git a/ge/graph/passes/memcpy_addr_async_pass.h b/ge/graph/passes/memcpy_addr_async_pass.h
index 0f22d10b..1c27a1d5 100755
--- a/ge/graph/passes/memcpy_addr_async_pass.h
+++ b/ge/graph/passes/memcpy_addr_async_pass.h
@@ -27,6 +27,7 @@ class MemcpyAddrAsyncPass : public GraphPass {
 
  private:
   Status AddMemcpyAddrAsyncNode(const ComputeGraphPtr &graph, const NodePtr &node);
+  Status AddMemcpyAsyncNode(const NodePtr &node);
   void FindUserData(const NodePtr &node, uint32_t &parent_index);
   void FindUserDataForKnown(const NodePtr &parent_node, uint32_t &parent_index);
   void FindUserDataForNonDynamic(const ge::NodePtr &parent_node, uint32_t &parent_index);
@@ -34,6 +35,8 @@ class MemcpyAddrAsyncPass : public GraphPass {
 
   NodePtr CreateMemcpyAddrAsyncNode(const ComputeGraphPtr &graph, const OutDataAnchorPtr &out_data_anchor,
                                     const NodePtr &out_of_user_data);
+  NodePtr CreateMemcpyAsyncNode(const ComputeGraphPtr &graph, const OutDataAnchorPtr &out_data_anchor,
+                                const NodePtr &out_of_user_data);
   Status InsertMemcpyAddrAsyncNode(const OutDataAnchorPtr &out_anchor, const InDataAnchorPtr &in_anchor,
                                    const NodePtr &node);
   Status InsertMemAddrAsyncNodeBeforeNetoutput(const ComputeGraphPtr &graph, const NodePtr &node);