diff --git a/parser/caffe/caffe_parser.h b/parser/caffe/caffe_parser.h
index 8b08b9a..aeb07aa 100644
--- a/parser/caffe/caffe_parser.h
+++ b/parser/caffe/caffe_parser.h
@@ -57,7 +57,7 @@ static std::map<std::vector<std::string>, std::vector<std::string>> params_share
 class PARSER_FUNC_VISIBILITY CaffeModelParser : public domi::ModelParser {
  public:
   CaffeModelParser() {}
-  virtual ~CaffeModelParser() override {}
+  ~CaffeModelParser() override {}
 
   /**
    * @ingroup domi_omg
diff --git a/parser/common/acl_graph_parser_util.cc b/parser/common/acl_graph_parser_util.cc
index 2721c01..f8e66d0 100644
--- a/parser/common/acl_graph_parser_util.cc
+++ b/parser/common/acl_graph_parser_util.cc
@@ -309,10 +309,10 @@ domi::Status AclGrphParseUtil::ParseAclOutputNodes(const string &out_nodes) {
           return PARAM_INVALID;
         }
 
-        auto iter = ge::GetParserContext().out_nodes_map.find(key_value_v[0]);
+        const auto iter = ge::GetParserContext().out_nodes_map.find(key_value_v[0]);
         int32_t index = stoi(StringUtils::Trim(key_value_v[1]));
         GELOGD("Get output info: node[%s] and index[%d]", key_value_v[0].c_str(), index);
-        if (iter != ge::GetParserContext().out_nodes_map.end()) {
+        if (iter != ge::GetParserContext().out_nodes_map.cend()) {
           iter->second.emplace_back(index);
         } else {
           std::vector<int32_t> index_v;
@@ -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/model_saver.cc b/parser/common/model_saver.cc
index 2963ad3..ae9d078 100644
--- a/parser/common/model_saver.cc
+++ b/parser/common/model_saver.cc
@@ -74,10 +74,9 @@ FMK_FUNC_HOST_VISIBILITY FMK_FUNC_DEV_VISIBILITY Status ModelSaver::SaveJsonToFi
     GELOGE(FAILED, "[Open][File] [%s] failed. %s", file_path, err_msg);
     return FAILED;
   }
-  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_str.c_str())), 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);
@@ -176,4 +175,4 @@ FMK_FUNC_HOST_VISIBILITY FMK_FUNC_DEV_VISIBILITY int ModelSaver::CreateDirectory
 }
 
 }  // namespace parser
-}  // namespace ge
\ No newline at end of file
+}  // namespace ge