diff --git a/parser/caffe/caffe_parser.cc b/parser/caffe/caffe_parser.cc
index 7f8ac0c..6ce8af7 100644
--- a/parser/caffe/caffe_parser.cc
+++ b/parser/caffe/caffe_parser.cc
@@ -74,6 +74,7 @@ using std::ifstream;
 
 namespace {
 const size_t kMaxErrStrLen = 128U;
+std::map<std::vector<std::string>, std::vector<std::string>> params_share_map;
 }  //  namespace
 
 namespace ge {
@@ -282,7 +283,7 @@ Status CheckPathValid(const char *model_path, const string &custom_proto, string
 const set<string> CaffeWeightsParser::skiped_layer_type_ = {"Split",   "SoftmaxWithLoss", "Accuracy", "Data",
                                                             "Dropout", "MultiLabelLMDB",  "Python",   "AnnotatedData"};
 
-Status CaffeModelParser::ParseInput(domi::caffe::NetParameter &proto_message, bool &input_data_flag) {
+Status CaffeModelParser::ParseInput(domi::caffe::NetParameter &proto_message, bool &input_data_flag) const {
   if (proto_message.input_size() > 0) {
     GELOGI("This net exsit input.");
 
@@ -456,7 +457,7 @@ Status CaffeModelParser::CustomProtoParse(const char *model_path, const string &
   return ret;
 }
 
-Status CaffeModelParser::ReadModelWithoutWarning(const char *model_path, google::protobuf::Message *message) {
+Status CaffeModelParser::ReadModelWithoutWarning(const char *model_path, google::protobuf::Message *message) const {
   int32_t copy_fd = mmDup(STDERR_FILENO);
   if (copy_fd < 0) {
     char_t err_buf[kMaxErrStrLen + 1U] = {};
@@ -536,7 +537,7 @@ Status CaffeModelParser::ReadCaffeModelFromText(const char *model_path, google::
 
 Status CaffeModelParser::ParseLayerParameter(const google::protobuf::Descriptor *layer_descriptor,
                                              const google::protobuf::Message *message,
-                                             vector<ge::Operator> &operators) {
+                                             vector<ge::Operator> &operators) const {
   auto field_name = layer_descriptor->FindFieldByName(kFieldName);
   CAFFE_CHECK_NULL_AND_REPROT_ERRORMSG(field_name, "Does not find name in google::protobuf::Descriptor");
   auto field_type = layer_descriptor->FindFieldByName(kFieldType);
@@ -624,7 +625,7 @@ void CaffeModelParser::AddOutputInfoToContext(string layer_name, int32_t top_ind
   ge::GetParserContext().user_out_nodes.push_back(std::make_pair(layer_name, top_index));
 }
 
-Status CaffeModelParser::ParseOutputNodeTopInfo(const domi::caffe::NetParameter &proto_message) {
+Status CaffeModelParser::ParseOutputNodeTopInfo(const domi::caffe::NetParameter &proto_message) const {
   if (ge::GetParserContext().user_out_tensors.empty()) {
     return SUCCESS;
   }
@@ -932,7 +933,7 @@ Status CaffeModelParser::AddTensorDescToOpDesc(ge::OpDescPtr &op_desc, const dom
 }
 
 Status CaffeModelParser::AddTensorDescToOpDescByIr(ge::OpDescPtr &op_desc, const domi::caffe::LayerParameter &layer,
-                                                   const string &op_type) {
+                                                   const string &op_type) const {
   if (std::find(kAddTensorIrSkipNodes.begin(), kAddTensorIrSkipNodes.end(), op_type) != kAddTensorIrSkipNodes.end()) {
     op_desc = ge::parser::MakeShared<ge::OpDesc>(layer.name(), op_type);
     GE_CHECK_NOTNULL(op_desc);
@@ -1202,7 +1203,7 @@ std::string CaffeModelParser::RemapTopNameByLayer(const domi::caffe::LayerParame
   return (top_name + "_" + layer.name() + "_" + std::to_string(index));
 }
 
-Status CaffeModelParser::PreCheck(const domi::caffe::NetParameter &net) {
+Status CaffeModelParser::PreCheck(const domi::caffe::NetParameter &net) const {
   // Add layer in the model to PreChecker and check the general parameters
   PreChecker::Instance().SetModelName(net.name());
   for (int i = 0; i < net.layer_size(); i++) {
@@ -1977,7 +1978,7 @@ Status CaffeWeightsParser::ParseLayerField(const google::protobuf::Reflection *r
 }
 
 Status CaffeWeightsParser::ConvertBlobsProto(const google::protobuf::Message *message,
-                                             google::protobuf::Message *blobs) {
+                                             google::protobuf::Message *blobs) const {
   const google::protobuf::Reflection *blobs_reflection = message->GetReflection();
   CAFFE_CHECK_NULL_AND_REPROT_ERRORMSG(blobs_reflection, "Get Reflection failed in google::protobuf::Message");
   vector<const google::protobuf::FieldDescriptor *> field_desc;
diff --git a/parser/caffe/caffe_parser.h b/parser/caffe/caffe_parser.h
index 8b08b9a..3b4491d 100644
--- a/parser/caffe/caffe_parser.h
+++ b/parser/caffe/caffe_parser.h
@@ -52,12 +52,11 @@ using std::string;
 using std::unordered_map;
 using std::vector;
 using domi::Status;
-static std::map<std::vector<std::string>, std::vector<std::string>> params_share_map;
 
 class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
  public:
   CaffeModelParser() {}
-  virtual ~CaffeModelParser() override {}
+  ~CaffeModelParser() override {}
 
   /**
    * @ingroup domi_omg
@@ -145,7 +144,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
    * @return SUCCESS build successfully
    * @return FAILED build failed
    */
-  Status PreCheck(const domi::caffe::NetParameter &net);
+  Status PreCheck(const domi::caffe::NetParameter &net) const;
 
   /**
    * @ingroup domi_omg
@@ -156,7 +155,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
    * @return SUCCESS build successfully
    * @return FAILED build failed
    */
-  Status ParseInput(domi::caffe::NetParameter &proto_message, bool &input_data_flag);
+  Status ParseInput(domi::caffe::NetParameter &proto_message, bool &input_data_flag) const;
 
   /*
    * @ingroup domi_omg
@@ -192,7 +191,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
    * @return SUCCESS read file successfully
    * @return FAILED read file failed
    */
-  Status ReadModelWithoutWarning(const char *model_path, google::protobuf::Message *message);
+  Status ReadModelWithoutWarning(const char *model_path, google::protobuf::Message *message) const;
 
   /*
    * @ingroup domi_omg
@@ -214,7 +213,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
    * @return FAILED parse layer failed
    */
   Status ParseLayerParameter(const google::protobuf::Descriptor *layer_descriptor,
-                             const google::protobuf::Message *message, std::vector<ge::Operator> &operators);
+                             const google::protobuf::Message *message, std::vector<ge::Operator> &operators) const;
 
   /*
    * @ingroup domi_omg
@@ -301,7 +300,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
   Status AddTensorDescToOpDesc(ge::OpDescPtr &op_desc, const domi::caffe::LayerParameter &layer) const;
 
   Status AddTensorDescToOpDescByIr(ge::OpDescPtr &op_desc, const domi::caffe::LayerParameter &layer,
-                                   const string &op_type);
+                                   const string &op_type) const;
 
   Status AddUserOutNodesTop();
 
@@ -321,7 +320,7 @@ class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
 
   void AddOutputInfoToContext(string layer_name, int32_t top_index) const;
 
-  Status ParseOutputNodeTopInfo(const domi::caffe::NetParameter &proto_message);
+  Status ParseOutputNodeTopInfo(const domi::caffe::NetParameter &proto_message) const;
 
   Status SaveDataLayerTops(const domi::caffe::LayerParameter &layer);
 
@@ -405,7 +404,7 @@ class PARSER_FUNC_VISIBILITY CaffeWeightsParser : public domi::WeightsParser {
                          google::protobuf::Message *layer);
 
   Status ConvertBlobsProto(const google::protobuf::Message *message,
-                           google::protobuf::Message *blobs);
+                           google::protobuf::Message *blobs) const;
 
   Status ConvertBlobShapeProto(const google::protobuf::Message *message,
                                google::protobuf::Message *dest_message) const;
diff --git a/parser/common/acl_graph_parser_util.cc b/parser/common/acl_graph_parser_util.cc
index 2721c01..97abc4a 100644
--- a/parser/common/acl_graph_parser_util.cc
+++ b/parser/common/acl_graph_parser_util.cc
@@ -266,7 +266,7 @@ void AclGrphParseUtil::SetDefaultFormat() {
   }
 }
 
-domi::Status AclGrphParseUtil::ParseAclOutputNodes(const string &out_nodes) {
+domi::Status AclGrphParseUtil::ParseAclOutputNodes(const string &out_nodes) const {
   try {
     ge::GetParserContext().out_nodes_map.clear();
     ge::GetParserContext().user_out_nodes.clear();
@@ -492,7 +492,7 @@ domi::Status AclGrphParseUtil::GetOutputLeaf(NodePtr node,
 }
 
 domi::Status AclGrphParseUtil::GetDefaultOutInfo(ge::ComputeGraphPtr &compute_graph,
-    std::vector<std::pair<ge::NodePtr, int32_t>> &output_nodes_info) {
+    std::vector<std::pair<ge::NodePtr, int32_t>> &output_nodes_info) const {
   std::vector<std::pair<std::string, int32_t>> default_out_nodes = ge::GetParserContext().default_out_nodes;
   if (!default_out_nodes.empty()) {
     for (size_t i = 0; i < default_out_nodes.size(); ++i) {
@@ -587,7 +587,7 @@ domi::Status AclGrphParseUtil::CheckOptions(const std::map<AscendString, AscendS
     }
 
     string key_str = key_ascend;
-    auto it = ge::ir_option::ir_parser_suppported_options.find(key_str);
+    std::set<std::string>::const_iterator it = ge::ir_option::ir_parser_suppported_options.find(key_str);
     if (it == ge::ir_option::ir_parser_suppported_options.end()) {
       ErrorManager::GetInstance().ATCReportErrMessage("E10016", {"parameter", "opname"}, {"parser_params", key_str});
       GELOGE(PARAM_INVALID, "[Check][Param] Input options include unsupported option(%s).Please check!", key_ascend);
@@ -651,7 +651,7 @@ domi::Status AclGrphParseUtil::ParseParamsBeforeGraph(const std::map<AscendStrin
 }
 
 domi::Status AclGrphParseUtil::ParseParamsAfterGraph(ge::Graph &graph,
-                                                     const std::map<AscendString, AscendString> &parser_params) {
+                                                     const std::map<AscendString, AscendString> &parser_params) const {
   // support paragrams: input_fp16_nodes, is_input_adjust_hw_layout,
   ComputeGraphPtr compute_graph = GraphUtils::GetComputeGraph(graph);
   GE_CHECK_NOTNULL(compute_graph);
@@ -943,7 +943,7 @@ FMK_FUNC_HOST_VISIBILITY bool ValidateStr(const std::string &filePath, const std
   regex_t reg;
   int cflags = REG_EXTENDED | REG_NOSUB;
   int ret = regcomp(&reg, mode.c_str(), cflags);
-  if (ret) {
+  if (ret != 0) {
     regerror(ret, &reg, ebuff, kMaxBuffSize);
     GELOGW("regcomp failed, reason: %s", ebuff);
     regfree(&reg);
@@ -951,7 +951,7 @@ FMK_FUNC_HOST_VISIBILITY bool ValidateStr(const std::string &filePath, const std
   }
 
   ret = regexec(&reg, filePath.c_str(), 0, nullptr, 0);
-  if (ret) {
+  if (ret != 0) {
     regerror(ret, &reg, ebuff, kMaxBuffSize);
     GELOGE(ge::PARAM_INVALID, "[Invoke][RegExec] failed, reason: %s", ebuff);
     regfree(&reg);
diff --git a/parser/common/acl_graph_parser_util.h b/parser/common/acl_graph_parser_util.h
index 4c63c7e..8af1d27 100644
--- a/parser/common/acl_graph_parser_util.h
+++ b/parser/common/acl_graph_parser_util.h
@@ -44,7 +44,8 @@ class AclGrphParseUtil {
   domi::Status SetOutputNodeInfo(ge::Graph &graph, const std::map<AscendString, AscendString> &parser_params);
   domi::Status ParseParamsBeforeGraph(const std::map<AscendString, AscendString> &parser_params,
                                       std::string &graph_name);
-  domi::Status ParseParamsAfterGraph(ge::Graph &graph, const std::map<AscendString, AscendString> &parser_params);
+  domi::Status ParseParamsAfterGraph(ge::Graph &graph, const std::map<AscendString,
+                                     AscendString> &parser_params) const;
 
  private:
   bool parser_initialized = false;
@@ -53,7 +54,7 @@ class AclGrphParseUtil {
   void CreateOutputNodesInfo(std::vector<std::pair<ge::NodePtr, int32_t>> &output_nodes_info,
                              std::vector<std::string> &output_nodes_name) const;
   static void SetDefaultFormat();
-  domi::Status ParseAclOutputNodes(const std::string &out_nodes);
+  domi::Status ParseAclOutputNodes(const std::string &out_nodes) const;
   domi::Status ParseAclOutputFp16NodesFormat(const std::string &is_output_fp16) const;
   domi::Status ParseAclEnableScope(const std::string &enable_scope_fusion_passes) const;
   static void AddAttrsForInputNodes(const vector<string> &adjust_fp16_format_vec, const string &fp16_nodes_name,
@@ -61,7 +62,7 @@ class AclGrphParseUtil {
   domi::Status ParseAclInputFp16Nodes(const ComputeGraphPtr &graph, const string &input_fp16_nodes,
                                       const string &is_input_adjust_hw_layout) const;
   domi::Status GetDefaultOutInfo(ge::ComputeGraphPtr &compute_graph,
-                                 std::vector<std::pair<ge::NodePtr, int32_t>> &output_nodes_info);
+                                 std::vector<std::pair<ge::NodePtr, int32_t>> &output_nodes_info) const;
 };
 
 namespace parser {
diff --git a/parser/common/model_saver.cc b/parser/common/model_saver.cc
index 2963ad3..21d9368 100644
--- a/parser/common/model_saver.cc
+++ b/parser/common/model_saver.cc
@@ -77,7 +77,7 @@ FMK_FUNC_HOST_VISIBILITY FMK_FUNC_DEV_VISIBILITY Status ModelSaver::SaveJsonToFi
   const char *model_char = model_str.c_str();
   uint32_t len = static_cast<uint32_t>(model_str.length());
   // Write data to file
-  mmSsize_t mmpa_ret = mmWrite(fd, const_cast<void *>((const void *)model_char), len);
+  mmSsize_t mmpa_ret = mmWrite(fd, const_cast<void *>(static_cast<const void *>(model_char)), len);
   if (mmpa_ret == EN_ERROR || mmpa_ret == EN_INVALID_PARAM) {
     char_t err_buf[kMaxErrStrLen + 1U] = {};
     const auto err_msg = mmGetErrorFormatMessage(mmGetErrorCode(), &err_buf[0], kMaxErrStrLen);
diff --git a/parser/common/parser_fp16_t.cc b/parser/common/parser_fp16_t.cc
index eca3cae..cf31644 100644
--- a/parser/common/parser_fp16_t.cc
+++ b/parser/common/parser_fp16_t.cc
@@ -48,7 +48,7 @@ static bool IsRoundOne(uint64_t man, uint16_t trunc_len) {
   uint64_t mask0 = 0x4;
   uint64_t mask1 = 0x2;
   uint64_t mask2;
-  uint16_t shift_out = static_cast<uint16_t>(trunc_len - kDim2);
+  uint16_t shift_out = static_cast<uint16_t>(trunc_len - static_cast<uint16_t>(kDim2));
   mask0 = mask0 << shift_out;
   mask1 = mask1 << shift_out;
   mask2 = mask1 - 1;
@@ -89,7 +89,7 @@ static float Fp16ToFloat(const uint16_t &fp_val) {
   int16_t hf_exp;
   ExtractFp16(fp_val, hf_sign, hf_exp, hf_man);
 
-  while (hf_man && !(hf_man & kFp16ManHideBit)) {
+  while ((hf_man != 0U) && ((hf_man & kFp16ManHideBit) == 0U)) {
     hf_man <<= 1;
     hf_exp--;
   }
@@ -120,7 +120,7 @@ static double Fp16ToDouble(const uint16_t &fp_val) {
   int16_t hf_exp;
   ExtractFp16(fp_val, hf_sign, hf_exp, hf_man);
 
-  while (hf_man && !(hf_man & kFp16ManHideBit)) {
+  while ((hf_man != 0U) && ((hf_man & kFp16ManHideBit) == 0U)) {
     hf_man <<= 1;
     hf_exp--;
   }
@@ -128,7 +128,7 @@ static double Fp16ToDouble(const uint16_t &fp_val) {
   uint64_t e_ret;
   uint64_t m_ret;
   uint64_t s_ret = hf_sign;
-  if (!hf_man) {
+  if (hf_man == 0U) {
     e_ret = 0;
     m_ret = 0;
   } else {
@@ -256,7 +256,7 @@ static uint8_t Fp16ToUInt8(const uint16_t &fp_val) {
         shift_out++;
       }
     }
-    if (!overflow_flag) {
+    if (overflow_flag == 0U) {
       bool need_round = IsRoundOne(long_int_m, shift_out + kFp16ManLen);
       m_ret = static_cast<uint8_t>((long_int_m >> (kFp16ManLen + shift_out)) & kBitLen8Max);
       if (need_round && m_ret != kBitLen8Max) {
@@ -290,7 +290,7 @@ static uint16_t GetUint16ValByMan(uint16_t s_ret, const uint64_t &long_int_m, co
   if (m_ret == 0) {
     s_ret = 0;
   }
-  return static_cast<uint16_t>((s_ret << kBitShift15) | (m_ret));
+  return static_cast<uint16_t>((s_ret << static_cast<uint16_t>(kBitShift15)) | (m_ret));
 }
 
 /// @ingroup fp16_t math conversion static method
@@ -431,7 +431,7 @@ static int32_t Fp16ToInt32(const uint16_t &fp_val) {
       s_ret = 0;
     }
     // Generate final result
-    ret_v = (s_ret << kBitShift31) | (m_ret);
+    ret_v = (s_ret << static_cast<uint16_t>(kBitShift31)) | (m_ret);
   }
 
   return *(ge::PtrToPtr<uint32_t, uint32_t>(&ret_v));
@@ -565,7 +565,7 @@ static uint16_t Fp16Add(uint16_t v_1, uint16_t v_2) {
     m_trunc = (m_b << (static_cast<uint16_t>(kBitShift32) - static_cast<uint16_t>(e_tmp)));
     m_b = RightShift(m_b, e_tmp);
   } else if (e_a < e_b) {
-    m_trunc = (m_a << (kBitShift32 - static_cast<uint16_t>(e_tmp)));
+    m_trunc = (m_a << (static_cast<uint16_t>(kBitShift32) - static_cast<uint16_t>(e_tmp)));
     m_a = RightShift(m_a, e_tmp);
   }
   // calculate mantissav
@@ -603,7 +603,7 @@ static uint16_t Fp16Mul(uint16_t v_1, uint16_t v_2) {
   m_a = m_a_tmp;
   m_b = m_b_tmp;
 
-  e_ret = ((e_a + e_b) - kFp16ExpBias) - kDim10;
+  e_ret = ((e_a + e_b) - kFp16ExpBias) - static_cast<int16_t>(kDim10);
   mul_m = m_a * m_b;
   s_ret = s_a ^ s_b;
 
@@ -905,7 +905,7 @@ fp16_t &fp16_t::operator=(const float &f_val) {
 fp16_t &fp16_t::operator=(const int8_t &i_val) {
   uint16_t s_ret, e_ret, m_ret;
 
-  s_ret = static_cast<uint16_t>(((static_cast<uint8_t>(i_val)) & 0x80) >> kDim7);
+  s_ret = static_cast<uint16_t>(((static_cast<uint8_t>(i_val)) & 0x80) >> static_cast<uint8_t>(kDim7));
   m_ret = static_cast<uint16_t>(((static_cast<uint8_t>(i_val)) & kInt8Max));
 
   if (m_ret == 0) {
@@ -952,14 +952,14 @@ static void SetValByUint16Val(const uint16_t &input_val, const uint16_t &sign, u
   uint16_t len = static_cast<uint16_t>(GetManBitLength(m_tmp));
   if (static_cast<bool>(m_tmp)) {
     int16_t e_ret;
-    if (len > kDim11) {
+    if (len > static_cast<uint16_t>(kDim11)) {
       e_ret = kFp16ExpBias + kFp16ManLen;
       uint16_t e_tmp = len - static_cast<uint16_t>(kDim11);
       uint32_t trunc_mask = 1;
       for (int i = 1; i < e_tmp; i++) {
         trunc_mask = (trunc_mask << 1) + 1;
       }
-      uint32_t m_trunc = (m_tmp & trunc_mask) << (kBitShift32 - e_tmp);
+      uint32_t m_trunc = (m_tmp & trunc_mask) << (static_cast<uint16_t>(kBitShift32) - e_tmp);
       for (int i = 0; i < e_tmp; i++) {
         m_tmp = (m_tmp >> 1);
         e_ret = e_ret + 1;
@@ -991,7 +991,7 @@ fp16_t &fp16_t::operator=(const int16_t &i_val) {
     val = 0;
   } else {
     uint16_t ui_val = *(ge::PtrToPtr<const int16_t, const int16_t>(&i_val));
-    auto s_ret = static_cast<uint16_t>(ui_val >> kBitShift15);
+    auto s_ret = static_cast<uint16_t>(ui_val >> static_cast<uint16_t>(kBitShift15));
     if (static_cast<bool>(s_ret)) {
       int16_t iValM = -i_val;
       ui_val = *(ge::PtrToPtr<int16_t, uint16_t>(&iValM));
@@ -1018,7 +1018,7 @@ fp16_t &fp16_t::operator=(const uint16_t &ui_val) {
       for (int i = 1; i < e_tmp; i++) {
         trunc_mask = (trunc_mask << 1) + 1;
       }
-      m_trunc = (m_ret & trunc_mask) << (kBitShift32 - e_tmp);
+      m_trunc = (m_ret & trunc_mask) << (static_cast<uint16_t>(kBitShift32) - e_tmp);
       for (int i = 0; i < e_tmp; i++) {
         m_ret = (m_ret >> 1);
         e_ret = e_ret + 1;
@@ -1040,7 +1040,7 @@ fp16_t &fp16_t::operator=(const uint16_t &ui_val) {
       }
     } else {
       e_ret = static_cast<int16_t>(kFp16ExpBias);
-      m_ret = m_ret << (kDim11 - len);
+      m_ret = m_ret << (static_cast<uint16_t>(kDim11) - len);
       e_ret = e_ret + (len - 1);
     }
     val = FP16_CONSTRUCTOR(0u, static_cast<uint16_t>(e_ret), m_ret);
@@ -1062,7 +1062,7 @@ static void SetValByUint32Val(const uint32_t &input_val, const uint16_t &sign, u
     for (int i = 1; i < e_tmp; i++) {
       trunc_mask = (trunc_mask << 1) + 1;
     }
-    m_trunc = (m_tmp & trunc_mask) << (kBitShift32 - e_tmp);
+    m_trunc = (m_tmp & trunc_mask) << (static_cast<uint16_t>(kBitShift32) - e_tmp);
     for (int i = 0; i < e_tmp; i++) {
       m_tmp = (m_tmp >> 1);
       e_ret = e_ret + 1;
@@ -1085,7 +1085,7 @@ static void SetValByUint32Val(const uint32_t &input_val, const uint16_t &sign, u
     }
   } else {
     e_ret = static_cast<int16_t>(kFp16ExpBias);
-    m_tmp = m_tmp << (kDim11 - len);
+    m_tmp = m_tmp << (static_cast<uint16_t>(kDim11) - len);
     e_ret = e_ret + (len - 1);
   }
   auto m_ret = static_cast<uint16_t>(m_tmp);
@@ -1097,7 +1097,7 @@ fp16_t &fp16_t::operator=(const int32_t &i_val) {
     val = 0;
   } else {
     uint32_t ui_val = *(ge::PtrToPtr<const int32_t, const uint32_t>(&i_val));
-    auto s_ret = static_cast<uint16_t>(ui_val >> kBitShift31);
+    auto s_ret = static_cast<uint16_t>(ui_val >> static_cast<uint16_t>(kBitShift31));
     if (static_cast<bool>(s_ret)) {
       int32_t iValM = -i_val;
       ui_val = *(ge::PtrToPtr<int32_t, uint32_t>(&iValM));
@@ -1124,7 +1124,7 @@ fp16_t &fp16_t::operator=(const uint32_t &ui_val) {
       for (int i = 1; i < e_tmp; i++) {
         trunc_mask = (trunc_mask << 1) + 1;
       }
-      m_trunc = (m_tmp & trunc_mask) << static_cast<uint32_t>(kBitShift32 - e_tmp);
+      m_trunc = (m_tmp & trunc_mask) << static_cast<uint32_t>(static_cast<uint16_t>(kBitShift32) - e_tmp);
       for (uint16_t i = 0; i < e_tmp; i++) {
         m_tmp = (m_tmp >> 1);
         e_ret = e_ret + 1;
@@ -1147,7 +1147,7 @@ fp16_t &fp16_t::operator=(const uint32_t &ui_val) {
       }
     } else {
       e_ret = static_cast<int16_t>(kFp16ExpBias);
-      m_tmp = m_tmp << (kDim11 - len);
+      m_tmp = m_tmp << (static_cast<uint16_t>(kDim11) - len);
       e_ret = e_ret + (len - 1);
     }
     auto m_ret = static_cast<uint16_t>(m_tmp);
diff --git a/parser/common/pass.h b/parser/common/pass.h
index 7f00962..7db45b6 100644
--- a/parser/common/pass.h
+++ b/parser/common/pass.h
@@ -19,8 +19,6 @@
 
 #include <memory>
 
-#include "common/fmk_error_codes.h"
-
 namespace ge {
 ///
 /// @ingroup domi_omg
diff --git a/parser/common/pre_checker.cc b/parser/common/pre_checker.cc
index dea8651..4fc79dc 100644
--- a/parser/common/pre_checker.cc
+++ b/parser/common/pre_checker.cc
@@ -218,9 +218,9 @@ Status PreChecker::Save(const string &file) {
 
   // Constructing JSON information of operators in order of network
   for (auto id : ops_) {
-    auto iter = op_map_.find(id);
-    GE_CHK_BOOL_RET_STATUS(iter != op_map_.end(), FAILED, "[Check][Param] don't find this op.");
-    Info &info = iter->second;
+    std::map<OpId, Info>::const_iterator iter = op_map_.find(id);
+    GE_CHK_BOOL_RET_STATUS(iter != op_map_.cend(), FAILED, "[Check][Param] don't find this op.");
+    const Info &info = iter->second;
 
     // Initialization operator general information
     nlohmann::json op = {{kKeyOpName, info.name}, {kKeyOpType, info.type}};
diff --git a/parser/common/proto_file_parser.cc b/parser/common/proto_file_parser.cc
index af4a4d0..0bae5db 100644
--- a/parser/common/proto_file_parser.cc
+++ b/parser/common/proto_file_parser.cc
@@ -67,7 +67,7 @@ bool GetIdentifier(const std::string &line, int &identifier) {
       break;
     }
     if (line[i] >= kMinNum && line[i] <= kMaxNum) {
-      identifier = identifier * kDecimalMulti + line[i] - kMinNum;
+      identifier = identifier * kDecimalMulti + static_cast<int>(line[i]) - static_cast<int>(kMinNum);
     }
     if (identifier > kMaxIdentifier || identifier < 0) {
       return false;
diff --git a/parser/common/register_tbe.cc b/parser/common/register_tbe.cc
index d21a61e..421c9cb 100644
--- a/parser/common/register_tbe.cc
+++ b/parser/common/register_tbe.cc
@@ -75,7 +75,7 @@ bool OpRegistrationTbe::Finalize(const OpRegistrationData &reg_data, bool is_tra
   return ret;
 }
 
-bool OpRegistrationTbe::RegisterParser(const OpRegistrationData &reg_data) {
+bool OpRegistrationTbe::RegisterParser(const OpRegistrationData &reg_data) const {
   if (reg_data.GetFrameworkType() == domi::TENSORFLOW) {
     std::shared_ptr<OpParserFactory> factory = OpParserFactory::Instance(domi::TENSORFLOW);
     if (factory == nullptr) {
diff --git a/parser/common/register_tbe.h b/parser/common/register_tbe.h
index 7e2803c..5578054 100644
--- a/parser/common/register_tbe.h
+++ b/parser/common/register_tbe.h
@@ -27,7 +27,7 @@ class OpRegistrationTbe {
   bool Finalize(const OpRegistrationData &reg_data, bool is_train = false);
 
  private:
-  bool RegisterParser(const OpRegistrationData &reg_data);
+  bool RegisterParser(const OpRegistrationData &reg_data) const;
 };
 }  // namespace ge
 
diff --git a/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc b/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc
index 23b859c..3b3eaf1 100644
--- a/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc
+++ b/parser/onnx/subgraph_adapter/if_subgraph_adapter.cc
@@ -45,7 +45,7 @@ domi::Status IfSubgraphAdapter::AdaptAndFindAllSubgraphs(
 
 domi::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, const std::string &parent_graph_name) {
+    std::map<std::string, ge::onnx::GraphProto *> &name_to_onnx_graph, const std::string &parent_graph_name) const {
   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());
diff --git a/parser/onnx/subgraph_adapter/if_subgraph_adapter.h b/parser/onnx/subgraph_adapter/if_subgraph_adapter.h
index ff2f6e6..eb6f492 100644
--- a/parser/onnx/subgraph_adapter/if_subgraph_adapter.h
+++ b/parser/onnx/subgraph_adapter/if_subgraph_adapter.h
@@ -32,7 +32,7 @@ class PARSER_FUNC_VISIBILITY IfSubgraphAdapter : public SubgraphAdapter {
  private:
   domi::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,
-                                    const std::string &parent_graph_name);
+                                    const std::string &parent_graph_name) const;
   domi::Status GetSubgraphsAllInputs(ge::onnx::GraphProto &onnx_graph, std::set<std::string> &all_inputs) const;
   void AddInputNodeForGraph(const std::set<std::string> &all_inputs, ge::onnx::GraphProto &onnx_graph) const;
   void AddInputForParentNode(const std::set<std::string> &all_inputs, ge::onnx::NodeProto &parent_node) const;
diff --git a/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.cc b/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.cc
index dd27d55..fce58d8 100644
--- a/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.cc
+++ b/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.cc
@@ -59,7 +59,7 @@ Status TensorFlowFusionCustomParserAdapter::ParseParams(const vector<const NodeD
 }
 
 Status TensorFlowFusionCustomParserAdapter::ParseParams(const std::vector<ge::Operator> &v_input_const,
-                                                        ge::NodePtr &node) {
+                                                        ge::NodePtr &node) const {
   GE_CHECK_NOTNULL(node);
   auto op_dest = node->GetOpDesc();
   GE_CHECK_NOTNULL(op_dest);
diff --git a/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.h b/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.h
index 676ff64..591b38c 100644
--- a/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.h
+++ b/parser/tensorflow/tensorflow_fusion_custom_parser_adapter.h
@@ -42,7 +42,7 @@ class PARSER_FUNC_VISIBILITY TensorFlowFusionCustomParserAdapter : public Tensor
   * @return FAILED parse failed
   * @author
   */
-  Status ParseParams(const std::vector<ge::Operator> &v_input_const, ge::NodePtr &node);
+  Status ParseParams(const std::vector<ge::Operator> &v_input_const, ge::NodePtr &node) const;
 };
 }  // namespace ge
 
diff --git a/parser/tensorflow/tensorflow_parser.cc b/parser/tensorflow/tensorflow_parser.cc
index a1a2d9a..189e176 100644
--- a/parser/tensorflow/tensorflow_parser.cc
+++ b/parser/tensorflow/tensorflow_parser.cc
@@ -3059,7 +3059,7 @@ Status TensorFlowModelParser::TrimGraphByInput(const domi::tensorflow::GraphDef
       GE_CHECK_NOTNULL(current_node);
       for (const string &input_name : current_node->input()) {
         string input_node_name = NodeNameFromInput(input_name);
-        if (!delete_nodes.count(input_node_name)) {
+        if (delete_nodes.count(input_node_name) == 0U) {
           next_inputs.insert(input_node_name);
         }
       }
@@ -3072,7 +3072,7 @@ Status TensorFlowModelParser::TrimGraphByInput(const domi::tensorflow::GraphDef
     if (static_cast<bool>(input_nodes.count(node.name()))) {
       *(filtered_graph_def.mutable_node()->Add()) = node;
     }
-    if (!delete_nodes.count(node.name())) {
+    if (delete_nodes.count(node.name()) == 0U) {
       *(filtered_graph_def.mutable_node()->Add()) = node;
     }
   }
@@ -3135,7 +3135,7 @@ Status TensorFlowModelParser::TrimGraphByOutput(const domi::tensorflow::GraphDef
       GE_CHECK_NOTNULL(current_node);
       for (const string &input_name : current_node->input()) {
         string input_node_name = NodeNameFromInput(input_name);
-        if (!required_nodes.count(input_node_name)) {
+        if (required_nodes.count(input_node_name) == 0U) {
           next_inputs.insert(input_node_name);
         }
       }