diff --git a/components/tree/style/index.less b/components/tree/style/index.less
index ca9053870a..da347b39f7 100644
--- a/components/tree/style/index.less
+++ b/components/tree/style/index.less
@@ -244,7 +244,8 @@
       left: 12px;
       width: 1px;
       height: 100%;
-      margin: 22px 0;
+      height: calc(100% - 22px); // Remove additional height if support
+      margin: 22px 0 0;
       border-left: 1px solid @border-color-base;
       content: ' ';
     }