diff --git a/packages/fineui/src/core/structure/cache.js b/packages/fineui/src/core/structure/cache.js
index e0ebe4607..38017a01c 100644
--- a/packages/fineui/src/core/structure/cache.js
+++ b/packages/fineui/src/core/structure/cache.js
@@ -13,7 +13,7 @@ export const Cache = {
         return Cache._getKeyPrefix() + (key || "");
     },
     getItem: function (key, opt = {}) {
-        const { defaultValue, typeConversion } = opt;
+        const { defaultValue = null, typeConversion } = opt;
         const storageKey = Cache._generateKey(key);
         let value = localStorage.getItem(storageKey);