diff --git a/packages/designer/src/builtin-simulator/host.less b/packages/designer/src/builtin-simulator/host.less
index 669a40f6d..5e230c400 100644
--- a/packages/designer/src/builtin-simulator/host.less
+++ b/packages/designer/src/builtin-simulator/host.less
@@ -4,6 +4,7 @@
   position: relative;
   height: 100%;
   width: 100%;
+  overflow: auto;
 
   &-canvas {
     position: absolute;