diff --git a/style/components/treeSelect.less b/style/components/treeSelect.less
index 75082338e5..59338fe9ed 100644
--- a/style/components/treeSelect.less
+++ b/style/components/treeSelect.less
@@ -188,6 +188,7 @@
   }
 
   &-disabled &-selection--single {
+    background: #f4f4f4;
     cursor: not-allowed;
   }