diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index f3ed35d0e3bdf0aad3958b84724ede6cff545294..fb6d7459318174bc864b8d0cc813df3d3e65dc00 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -266,33 +266,6 @@ void taosSetAllDebugFlag() {
     uInfo("all debug flag are set to %d", debugFlag);
   }
 }
-typedef struct {
-  char   *name;
-  int32_t len;
-  void *flag;  
-} SDynCfgLog; 
-
-bool taosDynCfgDebugFlag(const char *str, int32_t slen, int32_t flag) {
-  const SDynCfgLog  cfgLog[]  = {
-      {"debugFlag",  9,  NULL},        {"monDebugFlag", 12, &mDebugFlag},  {"vDebugFlag", 10, &vDebugFlag}, {"mDebugFlag", 10, &mDebugFlag},
-      {"cDebugFlag", 10, &cDebugFlag}, {"httpDebugFlag", 13, &httpDebugFlag}, {"qDebugflag", 10, &qDebugFlag}, {"sdbDebugFlag", 12, &sdbDebugFlag},
-      {"uDebugFlag", 10, &uDebugFlag}, {"tsdbDebugFlag", 13, &tsdbDebugFlag}, {"sDebugflag", 10, &sDebugFlag}, {"rpcDebugFlag", 12, &rpcDebugFlag},
-      {"dDebugFlag", 10, &dDebugFlag}, {"mqttDebugFlag", 13, &mqttDebugFlag}, {"wDebugFlag", 10, &wDebugFlag}, {"tmrDebugFlag", 12, &tmrDebugFlag},
-      {"cqDebugFlag", 11, &cqDebugFlag},
-  };
-  for (int i = 0; i < tListLen(cfgLog); i++) {
-    if (slen == cfgLog[i].len && strncasecmp(cfgLog[i].name, str, slen) == 0) {
-      if (cfgLog[i].flag == NULL) {
-        debugFlag = flag; 
-        taosSetAllDebugFlag(); 
-      } else {
-        *((int32_t *)(cfgLog[i].flag)) = flag;
-      }
-      return true;
-    }
-  }
-  return false;
-}
 
 bool taosCfgDynamicOptions(char *msg) {
   char *option, *value;
@@ -343,8 +316,10 @@ bool taosCfgDynamicOptions(char *msg) {
       }
       return true;
     }
-
-    return taosDynCfgDebugFlag(cfg->option, olen, vint);
+    if (strncasecmp(cfg->option, "debugFlag", olen) == 0) {
+       taosSetAllDebugFlag(); 
+    }
+    return true;
   }
 
   if (strncasecmp(option, "resetlog", 8) == 0) {