diff --git a/packages/designer/src/builtin-simulator/host.less b/packages/designer/src/builtin-simulator/host.less
index dbc118ca3..cbabf2d72 100644
--- a/packages/designer/src/builtin-simulator/host.less
+++ b/packages/designer/src/builtin-simulator/host.less
@@ -38,9 +38,10 @@
     top: 8px;
     .@{scope}-canvas-viewport {
       width: auto;
-      top: 90px;
+      top: 50px;
       left: 0px;
       right: 0px;
+      margin-top: 40px;
       max-height: 688px;
     }
   }