diff --git a/packages/vant-css/src/slider.css b/packages/vant-css/src/slider.css
index bb4184df1..982988fa0 100644
--- a/packages/vant-css/src/slider.css
+++ b/packages/vant-css/src/slider.css
@@ -21,6 +21,16 @@
     background-color: $white;
     transform: translate3d(50%, -50%, 0);
     box-shadow: 0 1px 2px rgba(0, 0, 0, .5);
+
+    /* use pseudo element to expand touch area */
+    &::after {
+      content: '';
+      position: absolute;
+      width: 200%;
+      height: 200%;
+      top: -50%;
+      left: -50%;
+    }
   }
 
   &--disabled {