diff --git a/components/menu/style/index.less b/components/menu/style/index.less
index febc75fe3c..b9c6234006 100644
--- a/components/menu/style/index.less
+++ b/components/menu/style/index.less
@@ -392,7 +392,6 @@
   &-dark&-horizontal > &-submenu {
     border-color: @menu-dark-bg;
     border-bottom: 0;
-    top: 0;
   }
 
   &-dark &-item,