diff --git a/packages/index-anchor/index.less b/packages/index-anchor/index.less
index ccfb9fa64..5cedd7612 100644
--- a/packages/index-anchor/index.less
+++ b/packages/index-anchor/index.less
@@ -7,8 +7,6 @@
   font-size: @index-anchor-font-size;
   line-height: @index-anchor-line-height;
   background-color: @index-anchor-background-color;
-  transition: color @index-anchor-transition-duration,
-    background-color @index-anchor-transition-duration;
 
   &--sticky {
     position: fixed;
diff --git a/packages/style/var.less b/packages/style/var.less
index ff0d20c78..cdd834c6a 100644
--- a/packages/style/var.less
+++ b/packages/style/var.less
@@ -249,7 +249,6 @@
 @index-anchor-line-height: 32px;
 @index-anchor-background-color: transparent;
 @index-anchor-sticky-background-color: @white;
-@index-anchor-transition-duration: .2s;
 
 // IndexBar
 @index-bar-index-font-size: 10px;