diff --git a/components/drawer/style/drawer.less b/components/drawer/style/drawer.less
index b3d0259f34..3691dbba55 100644
--- a/components/drawer/style/drawer.less
+++ b/components/drawer/style/drawer.less
@@ -191,6 +191,8 @@
     height: 0;
     background-color: @modal-mask-bg;
     opacity: 0;
+    left: 0;
+    top: 0;
     filter: ~'alpha(opacity=50)';
     transition: opacity @animation-duration-slow linear, height 0s ease @animation-duration-slow;
   }