diff --git a/mindspore/ccsrc/pipeline/pynative/pynative_execute.cc b/mindspore/ccsrc/pipeline/pynative/pynative_execute.cc
index d1946e7a0d..a7abb1c5d0 100644
--- a/mindspore/ccsrc/pipeline/pynative/pynative_execute.cc
+++ b/mindspore/ccsrc/pipeline/pynative/pynative_execute.cc
@@ -709,7 +709,7 @@ OpExecInfoPtr ForwardExecutor::GenerateOpExecInfo(const py::args &args) {
   return op_exec_info;
 }
 
-bool ForwardExecutor::FindOpMask(py::object obj, std::vector<int64_t> *op_masks, std::string id) {
+bool ForwardExecutor::FindOpMask(py::object obj, std::vector<int64_t> *op_masks, const std::string &id) {
   bool op_mask = false;
   auto temp = op_mask_map_.find(id);
   if (temp != op_mask_map_.end()) {
diff --git a/mindspore/ccsrc/pipeline/pynative/pynative_execute.h b/mindspore/ccsrc/pipeline/pynative/pynative_execute.h
index 9c1a54d8f0..9386c87381 100644
--- a/mindspore/ccsrc/pipeline/pynative/pynative_execute.h
+++ b/mindspore/ccsrc/pipeline/pynative/pynative_execute.h
@@ -406,7 +406,7 @@ class ForwardExecutor {
                                     PynativeStatusCode *status);
   AnfNodePtr MakeCNode(const OpExecInfoPtr &op_exec_info, std::vector<int64_t> *op_masks,
                        abstract::AbstractBasePtrList *args_spec_list);
-  bool FindOpMask(py::object obj, std::vector<int64_t> *op_masks, std::string id);
+  bool FindOpMask(py::object obj, std::vector<int64_t> *op_masks, const std::string &id);
   void GetArgsSpec(const OpExecInfoPtr &op_exec_info, std::vector<int64_t> *op_masks, std::vector<AnfNodePtr> *inputs,
                    abstract::AbstractBasePtrList *args_spec_list);
   abstract::AbstractBasePtr CheckConstValue(const PrimitivePyPtr &prim, const py::object &obj,