diff --git a/dbm-ui/backend/db_services/mysql/toolbox/views.py b/dbm-ui/backend/db_services/mysql/toolbox/views.py
index 794d31a392..15f0b12b8e 100644
--- a/dbm-ui/backend/db_services/mysql/toolbox/views.py
+++ b/dbm-ui/backend/db_services/mysql/toolbox/views.py
@@ -86,9 +86,7 @@ def slave_ins_add_domain(self, request, **kwargs):
         )
         cluster_entry.storageinstance_set.add(*slave_ins)
         try:
-            dns_manage.create_domain(
-                instance_list=[f"{slave_ins.machine.ip}#{slave_ins.port}"], add_domain_name=domain
-            )
+            dns_manage.create_domain(instance_list=["{}#{}".format(slave_ip, str(slave_port))], add_domain_name=domain)
         except Exception as e:
             logger.error(traceback.format_exc())
             return Response({"result": False, "message": _("添加dns记录失败{}".format(e))})