diff --git a/packages/vant/src/index-bar/index.less b/packages/vant/src/index-bar/index.less
index 361fecb30..6e93d833f 100644
--- a/packages/vant/src/index-bar/index.less
+++ b/packages/vant/src/index-bar/index.less
@@ -27,6 +27,7 @@ body {
 
     &--active {
       color: var(--van-index-bar-index-active-color);
+      font-weight: bold;
     }
   }
 }