diff --git a/packages/theme-chalk/src/input.scss b/packages/theme-chalk/src/input.scss
index 22754f0363..aa4aa5816d 100644
--- a/packages/theme-chalk/src/input.scss
+++ b/packages/theme-chalk/src/input.scss
@@ -423,13 +423,11 @@
       border-bottom-left-radius: 0;
       @include mixed-input-border(var(--el-input-border-color));
       &:hover {
-        z-index: 1;
         @include mixed-input-border(var(--el-input-hover-border-color));
       }
 
       &:focus {
         outline: none;
-        z-index: 2;
         @include mixed-input-border(var(--el-input-focus-border-color));
       }
     }