diff --git a/packages/tabs/index.less b/packages/tabs/index.less
index b6bbae96..da435dbc 100644
--- a/packages/tabs/index.less
+++ b/packages/tabs/index.less
@@ -70,6 +70,7 @@
     height: 2px;
     position: absolute;
     background-color: @red;
+    border-radius: 2px 0 2px 0;
   }
 
   &--line {
diff --git a/packages/tabs/index.ts b/packages/tabs/index.ts
index 5ca768d5..ad0ea848 100644
--- a/packages/tabs/index.ts
+++ b/packages/tabs/index.ts
@@ -120,7 +120,7 @@ VantComponent({
 
       this.getRect('.van-tab', true).then(rects => {
         const rect = rects[this.data.active];
-        const width = this.data.lineWidth || rect.width;
+        const width = this.data.lineWidth || (rect.width / 2);
         let left = rects
           .slice(0, this.data.active)
           .reduce((prev, curr) => prev + curr.width, 0);