diff --git a/packages/editor-skeleton/src/layouts/workbench.less b/packages/editor-skeleton/src/layouts/workbench.less
index ac97c1450..1004f6327 100644
--- a/packages/editor-skeleton/src/layouts/workbench.less
+++ b/packages/editor-skeleton/src/layouts/workbench.less
@@ -314,6 +314,7 @@ body {
       display: none;
       flex-shrink: 0;
       position: relative;
+      z-index: 820;
       &.lc-area-visible {
         display: block;
       }