diff --git a/mindspore/ccsrc/ir/dtype.cc b/mindspore/ccsrc/ir/dtype.cc
index 97291a3dc0..ac4bace5b1 100644
--- a/mindspore/ccsrc/ir/dtype.cc
+++ b/mindspore/ccsrc/ir/dtype.cc
@@ -345,7 +345,7 @@ TypePtr StringToNumberType(const std::string &type_name, const std::string &num_
       auto bits = std::stoi(type_name.substr(num_type_name.size()));
       type = std::make_shared<T>(bits);
     } catch (const std::exception &e) {
-      MS_LOG(EXCEPTION) << "" << num_type_name << " convert from string error " << e.what();
+      MS_LOG(EXCEPTION) << num_type_name << " convert from string error " << e.what();
     }
   }
   return type;
@@ -389,7 +389,7 @@ TypePtr TensorStrToType(const std::string &type_name) {
       }
       type = std::make_shared<TensorType>(element_type);
     } catch (const std::exception &e) {
-      MS_LOG(EXCEPTION) << "" << type_name << " convert from string error " << e.what();
+      MS_LOG(EXCEPTION) << type_name << " convert from string error " << e.what();
     }
   }
 
@@ -416,7 +416,7 @@ TypePtr ListStrToType(const std::string &type_name) {
       }
       type = std::make_shared<List>(element_types);
     } catch (const std::exception &e) {
-      MS_LOG(EXCEPTION) << "" << type_name << " convert from string error " << e.what();
+      MS_LOG(EXCEPTION) << type_name << " convert from string error " << e.what();
     }
   }
 
@@ -443,7 +443,7 @@ TypePtr TupleStrToType(const std::string &type_name) {
       }
       type = std::make_shared<Tuple>(element_types);
     } catch (const std::exception &e) {
-      MS_LOG(EXCEPTION) << "" << type_name << " convert from string error " << e.what();
+      MS_LOG(EXCEPTION) << type_name << " convert from string error " << e.what();
     }
   }
   return type;
@@ -484,7 +484,7 @@ TypePtr FunctionStrToType(const std::string &type_name) {
       }
       type = std::make_shared<Function>(args_type, retval);
     } catch (const std::exception &e) {
-      MS_LOG(EXCEPTION) << "" << type_name << " convert from string error " << e.what();
+      MS_LOG(EXCEPTION) << type_name << " convert from string error " << e.what();
     }
   }
   return type;
diff --git a/mindspore/ccsrc/ir/manager.cc b/mindspore/ccsrc/ir/manager.cc
index a53c9e95ae..150e68ef4d 100644
--- a/mindspore/ccsrc/ir/manager.cc
+++ b/mindspore/ccsrc/ir/manager.cc
@@ -888,7 +888,7 @@ void FuncGraphUserNodesCollector::OnMoveAllCNode(FuncGraphPtr src, FuncGraphPtr
 void FuncGraphJDirectCollector::OnModEdge(AnfNodePtr node, int, AnfNodePtr inp, EdgeProcessDirection direction) {
   if (IsValueNode<FuncGraph>(inp) && IsPrimitiveCNode(node, prim::kPrimJ)) {
     (void)Mod(node->func_graph(), GetValueNode<FuncGraphPtr>(inp), direction);
-    MS_LOG(DEBUG) << "" << node->func_graph()->ToString() << " users func graph "
+    MS_LOG(DEBUG) << node->func_graph()->ToString() << " users func graph "
                   << GetValueNode<FuncGraphPtr>(inp)->ToString() << " which contains J(func_graph), dir: " << direction;
   }
 }
@@ -945,7 +945,7 @@ FuncGraphSetPtr FuncGraphParentsTotalComputer::SeekParents(const FuncGraphPtr &f
 void FuncGraphParentsTotalComputer::RealRecompute(FuncGraphPtr fg) {
   MS_EXCEPTION_IF_NULL(fg);
   all_parents_direct_ = &(manager_->func_graph_parents_direct());
-  MS_LOG(DEBUG) << "" << fg->ToString() << " total func graph dep size:" << (*all_parents_direct_)[fg].size();
+  MS_LOG(DEBUG) << fg->ToString() << " total func graph dep size:" << (*all_parents_direct_)[fg].size();
   func_graph_parents_total_analysis_[fg].update(SeekParents(fg));
   MS_LOG(DEBUG) << "FuncGraphParentsTotalComputer end: " << func_graph_parents_total_analysis_[fg].size();
 }
@@ -1074,7 +1074,7 @@ void FuncGraphsUsedTotalComputer::RealRecompute(FuncGraphPtr fg) {
         if (func_graph_used_total_analysis_[fg].count(used_fg) == 0) {
           todo_new.push_back(used_fg);
         }
-        MS_LOG(DEBUG) << "" << fg->ToString() << " add func graph " << used_fg->ToString();
+        MS_LOG(DEBUG) << fg->ToString() << " add func graph " << used_fg->ToString();
         func_graph_used_total_analysis_[fg].add(used_fg);
       }
     }
@@ -1138,7 +1138,7 @@ void RecursiveComputer::CheckRecursiveGraphs(const FuncGraphPtr &fg, std::list<F
 bool FuncGraphJTotalComputer::SeekJ(const FuncGraphPtr &fg, const FuncGraphSetPtr &path) {
   MS_EXCEPTION_IF_NULL(path);
   if (path->contains(fg)) {
-    MS_LOG(DEBUG) << "" << fg->ToString() << " had been checked";
+    MS_LOG(DEBUG) << fg->ToString() << " had been checked";
     return false;
   }
   MS_EXCEPTION_IF_NULL(manager_);
@@ -1149,7 +1149,7 @@ bool FuncGraphJTotalComputer::SeekJ(const FuncGraphPtr &fg, const FuncGraphSetPt
       std::find_if(func_graph_counter_map[fg].begin(), func_graph_counter_map[fg].end(),
                    [path](const std::pair<FuncGraphPtr, int> iter) { return !path->contains(iter.first); });
     if (contains_j != func_graph_counter_map[fg].end()) {
-      MS_LOG(DEBUG) << "" << fg->ToString() << " contains J(" << contains_j->first->ToString() << ")";
+      MS_LOG(DEBUG) << fg->ToString() << " contains J(" << contains_j->first->ToString() << ")";
       return true;
     }
   }
@@ -1160,12 +1160,11 @@ bool FuncGraphJTotalComputer::SeekJ(const FuncGraphPtr &fg, const FuncGraphSetPt
   for (auto &item : used[fg]) {
     auto used_g = item.first;
     if (SeekJ(used_g, path)) {
-      MS_LOG(DEBUG) << "" << fg->ToString() << " users func graph " << used_g->ToString()
-                    << " which contains J(func_graph)";
+      MS_LOG(DEBUG) << fg->ToString() << " users func graph " << used_g->ToString() << " which contains J(func_graph)";
       return true;
     }
   }
-  MS_LOG(DEBUG) << "" << fg->ToString() << " doesn't contain J(func_graph)";
+  MS_LOG(DEBUG) << fg->ToString() << " doesn't contain J(func_graph)";
   return false;
 }
 
diff --git a/mindspore/ccsrc/ir/primitive.cc b/mindspore/ccsrc/ir/primitive.cc
index d40f8a265d..d848f9c0d8 100644
--- a/mindspore/ccsrc/ir/primitive.cc
+++ b/mindspore/ccsrc/ir/primitive.cc
@@ -145,14 +145,14 @@ py::function PrimitivePy::GetComputeFunction() {
   static const char *const compute_func_name = "vm_impl";
 
   if (py::hasattr(python_obj_, compute_func_name)) {
-    MS_LOG(INFO) << "" << name() << " compute_func_name";
+    MS_LOG(INFO) << name() << " compute_func_name";
     py::function fn = python_obj_.attr(compute_func_name).cast<py::function>();
     return fn;
   }
 
   static const std::string vm_module = "mindspore.ops.vm_impl_registry";
   static const std::string get_vm_impl_fn = "get_vm_impl_fn";
-  MS_LOG(INFO) << "" << name() << ": get_vm_impl_fn";
+  MS_LOG(INFO) << name() << ": get_vm_impl_fn";
   py::function get_fn = parse::python_adapter::GetPyFn(vm_module, get_vm_impl_fn);
   py::function vm_fn = get_fn(python_obj_);
 
diff --git a/mindspore/ccsrc/operator/composite/composite.cc b/mindspore/ccsrc/operator/composite/composite.cc
index 88db8b8ff8..da4700b053 100644
--- a/mindspore/ccsrc/operator/composite/composite.cc
+++ b/mindspore/ccsrc/operator/composite/composite.cc
@@ -676,7 +676,7 @@ void MultitypeFuncGraph::Register(const std::vector<std::string> &types_name, co
   for (auto &type_name : types_name) {
     auto type_ptr = StringToType(type_name);
     if (type_ptr == nullptr) {
-      MS_LOG(EXCEPTION) << "" << type_name << " convert from string error ";
+      MS_LOG(EXCEPTION) << type_name << " convert from string error ";
     }
     types.push_back(type_ptr);
   }
@@ -955,8 +955,7 @@ int CheckSliceMember(const AbstractBasePtr &member, int default_value, const std
     return default_value;
   }
 
-  MS_LOG(EXCEPTION) << "" << member_name << " should be a AbstractScalar or AbstractNone, but got "
-                    << member->ToString();
+  MS_LOG(EXCEPTION) << member_name << " should be a AbstractScalar or AbstractNone, but got " << member->ToString();
 }
 
 void GenerateTupleSliceParameter(const AbstractTuplePtr &tuple, const AbstractSlicePtr &slice, int *start_index,
diff --git a/mindspore/ccsrc/operator/prim_nn.cc b/mindspore/ccsrc/operator/prim_nn.cc
index 3591168187..1f9f650ac9 100644
--- a/mindspore/ccsrc/operator/prim_nn.cc
+++ b/mindspore/ccsrc/operator/prim_nn.cc
@@ -246,7 +246,7 @@ AbstractBasePtr InferImplBiasAddGrad(const AnalysisEnginePtr &, const PrimitiveP
   // Inputs: at least one tensor(y_backprop)
   // Outputs: dbias
   if (args_spec_list.empty()) {
-    MS_LOG(EXCEPTION) << "" << primitive->name() << " evaluator at least has 1 parameters, while the input size is "
+    MS_LOG(EXCEPTION) << primitive->name() << " evaluator at least has 1 parameters, while the input size is "
                       << args_spec_list.size() << ".";
   }
 
@@ -255,8 +255,7 @@ AbstractBasePtr InferImplBiasAddGrad(const AnalysisEnginePtr &, const PrimitiveP
   MS_EXCEPTION_IF_NULL(shape_y);
   std::vector<int> y_dims = shape_y->shape();
   if (y_dims.size() < 2) {
-    MS_LOG(EXCEPTION) << "" << primitive->name() << " input y backprop, dim should >= 2, while " << y_dims.size()
-                      << ".";
+    MS_LOG(EXCEPTION) << primitive->name() << " input y backprop, dim should >= 2, while " << y_dims.size() << ".";
   }
   std::vector<int> bias_dims = {y_dims[1]};
   ShapePtr ret_shape = std::make_shared<Shape>(bias_dims);
diff --git a/mindspore/ccsrc/operator/prim_statement.cc b/mindspore/ccsrc/operator/prim_statement.cc
index 239aed5bde..0b9d491ce6 100644
--- a/mindspore/ccsrc/operator/prim_statement.cc
+++ b/mindspore/ccsrc/operator/prim_statement.cc
@@ -80,8 +80,7 @@ AbstractBasePtr InferImplDot(const AnalysisEnginePtr &, const PrimitivePtr &prim
   auto y_shp_value = y_shp->shape();
   // Should be matrix which shape size is 2.
   if (x_shp_value.size() != 2 || y_shp_value.size() != 2) {
-    MS_LOG(EXCEPTION) << "" << op_name
-                      << " evaluator requires input two 2D tensors, while the dimensions of two tensors are "
+    MS_LOG(EXCEPTION) << op_name << " evaluator requires input two 2D tensors, while the dimensions of two tensors are "
                       << x_shp_value.size() << ", " << y_shp_value.size() << " ";
   }
   if (x_shp_value[1] != y_shp_value[0] && x_shp_value[1] != Shape::SHP_ANY && y_shp_value[0] != Shape::SHP_ANY) {
diff --git a/mindspore/ccsrc/optimizer/optimizer.h b/mindspore/ccsrc/optimizer/optimizer.h
index c4455484c4..cadbde0842 100644
--- a/mindspore/ccsrc/optimizer/optimizer.h
+++ b/mindspore/ccsrc/optimizer/optimizer.h
@@ -171,7 +171,7 @@ class Optimizer : public std::enable_shared_from_this<Optimizer> {
           };
           use_profile ? (WITH(MsProfile::GetProfile()->Step(pass_names_[i])) opt_func) : opt_func();
 #ifdef DEBUG
-          MS_LOG(DEBUG) << "" << name_ << " round " << counter << " OptPass " << pass_names_[i] << " end.";
+          MS_LOG(DEBUG) << name_ << " round " << counter << " OptPass " << pass_names_[i] << " end.";
           auto fg_name = name_ + "_r" + std::to_string(counter) + "_" + std::to_string(i) + "_" + pass_names_[i];
           func_graph->DumpFuncGraph(fg_name);
           DumpIR(fg_name + ".ir", func_graph);
diff --git a/mindspore/ccsrc/pipeline/parse/function_block.cc b/mindspore/ccsrc/pipeline/parse/function_block.cc
index 156f727b9e..16b0dfe30e 100644
--- a/mindspore/ccsrc/pipeline/parse/function_block.cc
+++ b/mindspore/ccsrc/pipeline/parse/function_block.cc
@@ -37,7 +37,7 @@ void FunctionBlock::AddPrevBlock(const FunctionBlockPtr &block) { prev_blocks_.p
 
 // write variable records the variable name to corresponding node
 void FunctionBlock::WriteVariable(const std::string &var_name, const AnfNodePtr &node) {
-  MS_LOG(DEBUG) << "" << func_graph_->ToString() << " write var " << var_name << " with node " << node->DebugString();
+  MS_LOG(DEBUG) << func_graph_->ToString() << " write var " << var_name << " with node " << node->DebugString();
   vars_[var_name] = node;
 }
 
@@ -71,7 +71,7 @@ AnfNodePtr FunctionBlock::ReadVariable(const std::string &var) {
   TraceManager::DebugTrace(std::make_shared<TracePhi>(debug_info));
   ParameterPtr phi_param = std::make_shared<Parameter>(func_graph());
   TraceManager::EndTrace();
-  MS_LOG(DEBUG) << "" << func_graph_->ToString() << " generate phi node " << phi_param->ToString() << " for " << var;
+  MS_LOG(DEBUG) << func_graph_->ToString() << " generate phi node " << phi_param->ToString() << " for " << var;
   func_graph()->add_parameter(phi_param);
   phi_nodes_[phi_param] = var;
   WriteVariable(var, phi_param);
diff --git a/mindspore/ccsrc/pipeline/pipeline.cc b/mindspore/ccsrc/pipeline/pipeline.cc
index 0c1c0a924b..7a1830e89a 100644
--- a/mindspore/ccsrc/pipeline/pipeline.cc
+++ b/mindspore/ccsrc/pipeline/pipeline.cc
@@ -333,7 +333,7 @@ void ExecutorPy::GetGeBackendPolicy() const {
   MS_EXCEPTION_IF_NULL(ms_context);
   std::string backend = ms_context->backend_policy();
   if (backend != "ge") {
-    MS_LOG(EXCEPTION) << "" << backend << " backend policy is not supported under ge backend!";
+    MS_LOG(EXCEPTION) << backend << " backend policy is not supported under ge backend!";
   }
 }
 
@@ -491,10 +491,10 @@ void RunPipelineAction(const ActionItem &action, pipeline::ResourcePtr resource,
 
   // load MindSpore IR from file
   if (action.first == "symbol_resolve") {
-    MS_LOG(DEBUG) << "" << action.first << " read ir file: " << ir_file;
+    MS_LOG(DEBUG) << action.first << " read ir file: " << ir_file;
     std::vector<FuncGraphPtr> graphs = ImportIR(ir_file);
     if (graphs.size() == 0) {
-      MS_LOG(EXCEPTION) << "" << action.first << " read ir file " << ir_file << " failed as no graph found";
+      MS_LOG(EXCEPTION) << action.first << " read ir file " << ir_file << " failed as no graph found";
     }
     auto manager = resource->manager();
     MS_EXCEPTION_IF_NULL(manager);
diff --git a/mindspore/ccsrc/pipeline/static_analysis/analysis_context.cc b/mindspore/ccsrc/pipeline/static_analysis/analysis_context.cc
index aeaa6b17f8..cd68268118 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/analysis_context.cc
+++ b/mindspore/ccsrc/pipeline/static_analysis/analysis_context.cc
@@ -78,7 +78,7 @@ AnalysisContextPtr AnalysisContext::Filter(const FuncGraphPtr &func_graph) {
       oss << ", context: " << iter.second.lock()->ToString() << "]";
     }
     oss << "}";
-    MS_LOG(EXCEPTION) << "" << oss.str() << " NodeInfo: " << trace::GetDebugInfo(func_graph->debug_info());
+    MS_LOG(EXCEPTION) << oss.str() << " NodeInfo: " << trace::GetDebugInfo(func_graph->debug_info());
   }
   return parent_context;
 }
diff --git a/mindspore/ccsrc/pipeline/static_analysis/evaluator.cc b/mindspore/ccsrc/pipeline/static_analysis/evaluator.cc
index 3ed92004c7..445be852bb 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/evaluator.cc
+++ b/mindspore/ccsrc/pipeline/static_analysis/evaluator.cc
@@ -33,8 +33,7 @@ void InferEntryLogging(const EvaluatorPtr &evaluator, const AbstractBasePtrList
     MS_LOG(DEBUG) << "Evaluator " << evaluator->ToString() << " run for " << out_conf->node()->scope()->name();
   }
   for (size_t i = 0; i < arg_spec_list.size(); i++) {
-    MS_LOG(DEBUG) << "" << evaluator->ToString() << " input[" << i
-                  << "] abstract value: " << arg_spec_list[i]->ToString();
+    MS_LOG(DEBUG) << evaluator->ToString() << " input[" << i << "] abstract value: " << arg_spec_list[i]->ToString();
   }
 }
 
@@ -137,7 +136,7 @@ AbstractBasePtrList FuncGraphEvaluator::NormalizeArgs(const AbstractBasePtrList
                            MS_EXCEPTION_IF_NULL(arg);
                            return arg->Broaden();
                          });
-    MS_LOG(DEBUG) << "" << func_graph_->ToString() << " original: " << mindspore::ToString(args_spec_list)
+    MS_LOG(DEBUG) << func_graph_->ToString() << " original: " << mindspore::ToString(args_spec_list)
                   << ", broaded: " << mindspore::ToString(broaded_list);
     return broaded_list;
   }
@@ -230,20 +229,20 @@ AbstractBasePtr Evaluator::Run(AnalysisEnginePtr engine, const ConfigPtrList &ar
   MS_EXCEPTION_IF_NULL(cache_);
   auto iter = cache_->find(args_spec_list);
   if (iter == cache_->end()) {
-    MS_LOG(DEBUG) << "" << evaluator_name << " cache miss, call Infer().";
+    MS_LOG(DEBUG) << evaluator_name << " cache miss, call Infer().";
     AbstractBasePtr ret = Infer(engine, args_spec_list);
     if (ret == nullptr) {
       InferFailLogging(shared_from_base<Evaluator>(), args_spec_list, out_conf);
       MS_LOG(EXCEPTION) << "Evaluator " << evaluator_name << " result is nullptr.";
     }
     MS_EXCEPTION_IF_NULL(ret);
-    MS_LOG(DEBUG) << "" << evaluator_name << " set cache. return: " << ret->ToString() << ".";
+    MS_LOG(DEBUG) << evaluator_name << " set cache. return: " << ret->ToString() << ".";
     (*cache_)[args_spec_list] = ret;
     trace::TraceGraphInferLeave(shared_from_base<Evaluator>());
     return ret;
   } else {
     MS_EXCEPTION_IF_NULL(iter->second);
-    MS_LOG(DEBUG) << "" << evaluator_name << " cache hit. return: " << iter->second->ToString() << ".";
+    MS_LOG(DEBUG) << evaluator_name << " cache hit. return: " << iter->second->ToString() << ".";
     trace::TraceGraphInferLeave(shared_from_base<Evaluator>());
     return iter->second;
   }
diff --git a/mindspore/ccsrc/pipeline/static_analysis/param_validator.cc b/mindspore/ccsrc/pipeline/static_analysis/param_validator.cc
index 69f6af0dc0..2cbd33c162 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/param_validator.cc
+++ b/mindspore/ccsrc/pipeline/static_analysis/param_validator.cc
@@ -103,7 +103,7 @@ ShapePtr CheckShapeSame(const std::string &op, const AbstractTensorPtr &tensor_b
   ShapePtr shape_base = tensor_base->shape();
   ShapePtr shape = tensor->shape();
   if (*shape != *shape_base) {
-    MS_LOG(EXCEPTION) << "" << op << " evaluator first arg shape " << tensor->shape()->ToString()
+    MS_LOG(EXCEPTION) << op << " evaluator first arg shape " << tensor->shape()->ToString()
                       << " are not consistent with second arg shape " << tensor_base->shape()->ToString();
   }
   return shape_base;
@@ -113,7 +113,7 @@ TypePtr CheckDtypeSame(const std::string &op, const AbstractTensorPtr &tensor_ba
   TypePtr type_base = tensor_base->element()->BuildType();
   TypePtr type = tensor->element()->BuildType();
   if (*type != *type_base) {
-    MS_LOG(EXCEPTION) << "" << op << " evaluator first arg dtype " << type_base->ToString()
+    MS_LOG(EXCEPTION) << op << " evaluator first arg dtype " << type_base->ToString()
                       << " are not consistent with second arg dtype " << type->ToString();
   }
   return type_base;
@@ -121,14 +121,14 @@ TypePtr CheckDtypeSame(const std::string &op, const AbstractTensorPtr &tensor_ba
 
 int CheckAxis(const std::string &op, const ValuePtr &axis, int minimum, int max) {
   if (axis == nullptr) {
-    MS_LOG(EXCEPTION) << "" << op << " evaluator axis is null";
+    MS_LOG(EXCEPTION) << op << " evaluator axis is null";
   }
   if (!axis->isa<Int32Imm>()) {
-    MS_LOG(EXCEPTION) << "" << op << " evaluator axis should be int, but got " << axis->type_name();
+    MS_LOG(EXCEPTION) << op << " evaluator axis should be int, but got " << axis->type_name();
   }
   int axis_value = GetValue<int>(axis);
   if (axis_value > max || axis_value < minimum) {
-    MS_LOG(EXCEPTION) << "" << op << " evaluator axis value should be in the range [" << minimum << ", " << max
+    MS_LOG(EXCEPTION) << op << " evaluator axis value should be in the range [" << minimum << ", " << max
                       << "], but get " << axis_value;
   }
   return axis_value;
@@ -136,8 +136,7 @@ int CheckAxis(const std::string &op, const ValuePtr &axis, int minimum, int max)
 void CheckArgsSize(const std::string &op, const mindspore::abstract::AbstractBasePtrList &args_spec_list,
                    size_t size_expect) {
   if (args_spec_list.size() != size_expect) {
-    MS_LOG(EXCEPTION) << "" << op << " input args size should be " << size_expect << ", but got "
-                      << args_spec_list.size();
+    MS_LOG(EXCEPTION) << op << " input args size should be " << size_expect << ", but got " << args_spec_list.size();
   }
 
   for (size_t i = 0; i < size_expect; i++) {
diff --git a/mindspore/ccsrc/pipeline/static_analysis/param_validator.h b/mindspore/ccsrc/pipeline/static_analysis/param_validator.h
index 5904c7e67a..ecb9529a58 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/param_validator.h
+++ b/mindspore/ccsrc/pipeline/static_analysis/param_validator.h
@@ -70,7 +70,7 @@ ABSTRACT_REPORT_NAME_TRAITS(Class)
 template <typename T>
 std::shared_ptr<T> CheckArg(const std::string &op, const AbstractBasePtrList &args_spec_list, size_t index) {
   if (index >= args_spec_list.size()) {
-    MS_EXCEPTION(ValueError) << "" << op << " evaluator args list index out of bound, size " << args_spec_list.size()
+    MS_EXCEPTION(ValueError) << op << " evaluator args list index out of bound, size " << args_spec_list.size()
                              << ", index " << index;
   }
   auto arg = dyn_cast<T>(args_spec_list[index]);
diff --git a/mindspore/ccsrc/pipeline/static_analysis/static_analysis.cc b/mindspore/ccsrc/pipeline/static_analysis/static_analysis.cc
index 4afc3509ba..69deaa1ec1 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/static_analysis.cc
+++ b/mindspore/ccsrc/pipeline/static_analysis/static_analysis.cc
@@ -122,7 +122,7 @@ AnalysisResult AnalysisEngine::Run(const FuncGraphPtr &func_graph, const Abstrac
   MS_EXCEPTION_IF_NULL(root_context->func_graph());
   AnfNodeConfigPtr output_conf = MakeConfig(root_context->func_graph()->get_return(), root_context);
   MS_EXCEPTION_IF_NULL(func_graph);
-  MS_LOG(INFO) << "" << func_graph->ToString() << ": Run finished.";
+  MS_LOG(INFO) << func_graph->ToString() << ": Run finished.";
 
   AnalysisResult result;
   MS_EXCEPTION_IF_NULL(output_conf);
@@ -167,7 +167,7 @@ AbstractBasePtr AnalysisEngine::Eval(const AnfNodeConfigPtr &conf) {
   for (auto iter : compute_conf_stack_) {
     buffer << " -> " << iter->DebugString();
   }
-  MS_LOG(DEBUG) << "" << buffer.str();
+  MS_LOG(DEBUG) << buffer.str();
 #endif
   MS_LOG(DEBUG) << "Begin Eval NodeConfig " << conf->ToString();
   MS_EXCEPTION_IF_NULL(node);
diff --git a/mindspore/ccsrc/pipeline/static_analysis/utils.cc b/mindspore/ccsrc/pipeline/static_analysis/utils.cc
index 997a089301..4c399f6ffc 100644
--- a/mindspore/ccsrc/pipeline/static_analysis/utils.cc
+++ b/mindspore/ccsrc/pipeline/static_analysis/utils.cc
@@ -175,7 +175,7 @@ std::vector<int> RealBroadcast(const std::string &op, std::vector<int> x_shape,
       output_i = x_i;
     } else {
       MS_LOG(EXCEPTION)
-        << "" << op
+        << op
         << " evaluator the shape of first tensor and the shape of second tensor do not meet the broadcasting "
            "requirements";
     }
diff --git a/mindspore/ccsrc/transform/convert.cc b/mindspore/ccsrc/transform/convert.cc
index c9a1b21941..177f939f37 100644
--- a/mindspore/ccsrc/transform/convert.cc
+++ b/mindspore/ccsrc/transform/convert.cc
@@ -623,7 +623,7 @@ void DfGraphConvertor::InitParamWithData(const TensorOrderMap &tensors) {
     auto node_itor = params_.find(name);
     // if name not in params_, create a node in graph
     if (node_itor == params_.end()) {
-      MS_LOG(WARNING) << "" << name << " is not in params, and create a new node.";
+      MS_LOG(WARNING) << name << " is not in params, and create a new node.";
       ParameterPtr param = anf_graph_->add_parameter();
       name = name + "_temp";
       param->set_name(name);
diff --git a/mindspore/ccsrc/vm/vm.cc b/mindspore/ccsrc/vm/vm.cc
index 95ceceb67f..a897c72f8f 100644
--- a/mindspore/ccsrc/vm/vm.cc
+++ b/mindspore/ccsrc/vm/vm.cc
@@ -216,8 +216,8 @@ void FinalVM::InstCall(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 1;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -232,8 +232,8 @@ void FinalVM::InstTailCall(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 3;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -261,7 +261,7 @@ void FinalVM::InstTailCall(const VectorRef &args) {
 void FinalVM::InstSwitchReturn(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   if (args.size() != 1) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires one parameter, while the input size is " << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires one parameter, while the input size is " << args.size() << ".";
     return;
   }
   Pop(1);
@@ -272,8 +272,8 @@ void FinalVM::InstReturn(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 2;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -295,7 +295,7 @@ void FinalVM::InstPartial(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 1;
   if (args.size() < args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " or more parameters, while the input size is "
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " or more parameters, while the input size is "
                   << args.size() << ".";
     return;
   }
@@ -314,8 +314,8 @@ void FinalVM::InstPartial(const VectorRef &args) {
 void FinalVM::InstSimuSwitch(const VectorRef &args) {
   const size_t args_size = 4;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is " << args.size()
+                  << ".";
     return;
   }
   bool cond = utils::cast<bool>(args[0]);
@@ -368,8 +368,8 @@ void FinalVM::InstSimuSwitch(const VectorRef &args) {
 void FinalVM::InstRealSwitch(const VectorRef &args) {
   const size_t args_size = 3;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameters, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -378,7 +378,7 @@ void FinalVM::InstRealSwitch(const VectorRef &args) {
   int vfalse = utils::cast<int>(args[2]);
 
   BaseRef c = Ref(cond);
-  MS_LOG(DEBUG) << "" << vtrue << " false:" << vfalse << " InstSwitch: " << c.ToString();
+  MS_LOG(DEBUG) << vtrue << " false:" << vfalse << " InstSwitch: " << c.ToString();
   bool bool_value = false;
   if (backend_->GetCond(c, &bool_value)) {
     MS_LOG(DEBUG) << "Cond:" << bool_value;
@@ -417,8 +417,8 @@ void FinalVM::InstPush(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 1;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -431,8 +431,8 @@ void FinalVM::InstInput(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 1;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
@@ -445,13 +445,13 @@ void FinalVM::InstPadStack(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start";
   const size_t args_size = 1;
   if (args.size() != args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is "
-                  << args.size() << ".";
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " parameter, while the input size is " << args.size()
+                  << ".";
     return;
   }
 
   int sz = utils::cast<int>(args[0]);
-  MS_LOG(DEBUG) << "" << insts_stack_.size() << " need padstack " << sz << " sp_ " << sp_;
+  MS_LOG(DEBUG) << insts_stack_.size() << " need padstack " << sz << " sp_ " << sp_;
   size_t stack_size = insts_stack_.size();
   int need = sz - (static_cast<int>(stack_size) - sp_);
   if (need > 0) {
@@ -501,7 +501,7 @@ void FinalVM::InstPushPrim(const VectorRef &args) {
   MS_LOG(DEBUG) << "Start: " << args.size();
   const size_t args_size = 2;
   if (args.size() < args_size) {
-    MS_LOG(ERROR) << "" << __FUNCTION__ << " requires " << args_size << " or more parameters, while the input size is "
+    MS_LOG(ERROR) << __FUNCTION__ << " requires " << args_size << " or more parameters, while the input size is "
                   << args.size() << ".";
     return;
   }
diff --git a/mindspore/ccsrc/vm/vmimpl.cc b/mindspore/ccsrc/vm/vmimpl.cc
index 017121f334..d83bb8f190 100644
--- a/mindspore/ccsrc/vm/vmimpl.cc
+++ b/mindspore/ccsrc/vm/vmimpl.cc
@@ -445,7 +445,7 @@ BaseRef RunOperation(const PrimitivePtr &prim, const VectorRef &args) {
   MS_LOG(DEBUG) << "operation start " << prim->name();
   auto func = operation != nullptr ? operation->GetComputeFunction() : prim->GetComputeFunction();
   if (py::isinstance<py::none>(func)) {
-    MS_LOG(EXCEPTION) << "" << prim->name() << " 's compute function is not implemented";
+    MS_LOG(EXCEPTION) << prim->name() << " 's compute function is not implemented";
   }
 
   py::tuple py_args = py::tuple(args.size());