diff --git a/ge/offline/single_op_parser.cc b/ge/offline/single_op_parser.cc
index 2697d96b..5a8ca923 100644
--- a/ge/offline/single_op_parser.cc
+++ b/ge/offline/single_op_parser.cc
@@ -134,22 +134,6 @@ map<string, Format> kFormatDict = {
     {"fractal_z_g", FORMAT_FRACTAL_Z_G}
 };
 
-map<string, DataType> kDataTypeStringToEnum = {
-    {"DT_BOOL", DT_BOOL},
-    {"DT_INT8", DT_INT8},
-    {"DT_UINT8", DT_UINT8},
-    {"DT_INT16", DT_INT16},
-    {"DT_UINT16", DT_UINT16},
-    {"DT_INT32", DT_INT32},
-    {"DT_UINT32", DT_UINT32},
-    {"DT_INT64", DT_INT64},
-    {"DT_UINT64", DT_UINT64},
-    {"DT_FLOAT16", DT_FLOAT16},
-    {"DT_FLOAT", DT_FLOAT},
-    {"DT_DOUBLE", DT_DOUBLE},
-    {"DT_COMPLEX64", DT_COMPLEX64}
-};
-
 std::string GenerateFileName(const SingleOpDesc &single_op_desc, int index) {
   std::stringstream file_name_ss;
   file_name_ss << index;