diff --git a/packages/site-components/src/styles/docs.less b/packages/site-components/src/styles/docs.less
index aa27e5e1..4100d25f 100755
--- a/packages/site-components/src/styles/docs.less
+++ b/packages/site-components/src/styles/docs.less
@@ -280,8 +280,7 @@ div[name="DESIGN"] {
 .tdesign-toc_container {
   width: 240px;
   padding-right: 10px;
-  max-height: 480px;
-  max-height: ~"min(calc(100vh - 550px), 480px)";
+  max-height: calc(100vh - 214px);
   overflow: hidden auto;
   position: absolute;
   right: 24px;