diff --git a/packages/components/cascader/src/index.vue b/packages/components/cascader/src/index.vue
index 63c5f4d9e0..12f422a1cc 100644
--- a/packages/components/cascader/src/index.vue
+++ b/packages/components/cascader/src/index.vue
@@ -509,7 +509,7 @@ export default defineComponent({
         case EVENT_CODE.down:
           togglePopperVisible(true)
           nextTick(focusFirstNode)
-          event.preventDefault()
+          e.preventDefault()
           break
         case EVENT_CODE.esc:
         case EVENT_CODE.tab: