diff --git a/src/views/main.vue b/src/views/main.vue
index 0d5ec192..2a5bc71e 100644
--- a/src/views/main.vue
+++ b/src/views/main.vue
@@ -7,7 +7,7 @@
       { 'aui-sidebar--fold': $store.state.sidebarFold },
       {
         'aui-sidebar--noside':
-          $store.state.sidebarActiveSubMenuList.length == 0,
+          $store.state.sidebarActiveSubMenuList.length == 0 || $store.state.inIframe,
       },
       { 'z-iframe': $store.state.inIframe },
     ]"