diff --git a/packages/theme/src/tree-menu/index.less b/packages/theme/src/tree-menu/index.less
index a6022bc6a6..b4f0813ab8 100644
--- a/packages/theme/src/tree-menu/index.less
+++ b/packages/theme/src/tree-menu/index.less
@@ -127,22 +127,11 @@
   .@{input-prefix-cls} {
     .@{input-prefix-cls}__inner {
       border: none;
+      border-bottom: 1px solid var(--ti-tree-menu-border-color);
     }
   }
 
   .@{tree-prefix-cls} {
-    padding-top: var(--ti-tree-menu-padding-top);
-    position: relative;
-
-    &:after {
-      content: '';
-      position: absolute;
-      left: 20px;
-      right: 20px;
-      top: 0;
-      bottom: 0;
-      border-top: 1px solid  var(--ti-tree-menu-border-top-color);
-    }
     .@{tree-node-prefix-cls} {
       &.is-disabled {
         & > .@{tree-node-prefix-cls}__content a {