diff --git a/src/layout/components/TabMenu/src/TabMenu.vue b/src/layout/components/TabMenu/src/TabMenu.vue
index c4f63a3f..055a6aff 100644
--- a/src/layout/components/TabMenu/src/TabMenu.vue
+++ b/src/layout/components/TabMenu/src/TabMenu.vue
@@ -139,7 +139,7 @@ export default defineComponent({
         id={`${variables.namespace}-menu`}
         class={[
           prefixCls,
-          'relative bg-[var(--left-menu-bg-color)] top-1px z-3000 layout-border__right',
+          'relative bg-[var(--left-menu-bg-color)] top-1px layout-border__right',
           {
             'w-[var(--tab-menu-max-width)]': !unref(collapse),
             'w-[var(--tab-menu-min-width)]': unref(collapse)