diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index ae5a322b0567d25151776c2a24ccd57baebabf64..8a2b2752a1e89eecb3cc7b3f7ca8442b7e0332ec 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -224,6 +224,8 @@ TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass,
     }
   }
 
+  printf("connect failed, reason: %s\n\n", taos_errstr(pSql));
+
   return NULL;
 }
 
diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 167547349363fed08f87012bccdd3ecbdf2d81b5..c54cd9fa75331419efeeee8c36e5a93f1a4faaf9 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -87,7 +87,6 @@ TAOS *shellInit(SShellArguments *_args) {
   }
 
   if (con == NULL) {
-    printf("\033[31mfailed to connect to db, reason:%s\033[0m\n", taos_errstr(con));
     fflush(stdout);
     return con;
   }