diff --git a/tools/taos-tools/src/benchMain.c b/tools/taos-tools/src/benchMain.c
index 9d3583c7a8..fa47329b37 100644
--- a/tools/taos-tools/src/benchMain.c
+++ b/tools/taos-tools/src/benchMain.c
@@ -98,24 +98,6 @@ int32_t applyConfigDir(char * cfgDir){
     return code;
  }
 
-int32_t setConnMode(int8_t  connMode) {
-    // default
-    if (connMode == CONN_MODE_INVALID) {
-        connMode = CONN_MODE_DEFAULT;
-    }
-
-    // set conn mode
-    char * strMode = connMode == CONN_MODE_NATIVE ? STR_NATIVE : STR_WEBSOCKET;
-    int32_t code = taos_options(TSDB_OPTION_DRIVER, strMode);
-    if (code != TSDB_CODE_SUCCESS) {
-        engineError(INIT_PHASE, "taos_options", code);
-        return code;
-    }
-
-    infoPrint("Connect mode is : %s\n\n", strMode);
-    return 0;
-}
-
 int main(int argc, char* argv[]) {
     int ret = 0;