diff --git a/components/menu/style/index.less b/components/menu/style/index.less
index 9e8a084206..7a67a01797 100644
--- a/components/menu/style/index.less
+++ b/components/menu/style/index.less
@@ -504,6 +504,10 @@
     }
   }
 
+  &-dark&-submenu-popup {
+    background: transparent;
+  }
+
   &-dark &-inline&-sub {
     background: @menu-dark-submenu-bg;
     box-shadow: 0 2px 8px rgba(0, 0, 0, .45) inset;