diff --git a/dbm-ui/backend/db_services/mysql/toolbox/views.py b/dbm-ui/backend/db_services/mysql/toolbox/views.py
index 533211b79c..8a370a672f 100644
--- a/dbm-ui/backend/db_services/mysql/toolbox/views.py
+++ b/dbm-ui/backend/db_services/mysql/toolbox/views.py
@@ -68,7 +68,7 @@ class TendbHaSlaveInstanceAddDomainSet(viewsets.SystemViewSet):
     def slave_ins_add_domain(self, request, **kwargs):
         data = self.params_validate(self.get_serializer_class())
         cluster_id = data["cluster_id"]
-        domain = data["domain"]
+        domain = data["domain_name"]
         slave_ip = data["slave_ip"]
         slave_port = data["slave_port"]
         if ClusterEntry.objects.filter(cluster_entry_type=ClusterEntryType.DNS.value, entry=domain).exists():