diff --git a/packages/nav-bar/index.ts b/packages/nav-bar/index.ts
index c405331f..0323b44a 100644
--- a/packages/nav-bar/index.ts
+++ b/packages/nav-bar/index.ts
@@ -18,7 +18,7 @@ VantComponent({
     },
     zIndex: {
       type: Number,
-      value: 120
+      value: 1
     }
   },