diff --git a/packages/utils/src/encryption/crypto.ts b/packages/utils/src/encryption/crypto.ts
index 5e938f0a..776ad37a 100644
--- a/packages/utils/src/encryption/crypto.ts
+++ b/packages/utils/src/encryption/crypto.ts
@@ -26,5 +26,5 @@ export function encodeBase64(str: string) {
  * 解码base64
  */
 export function decodeBase64(str: string) {
-  return CryptoJS.enc.Base64.parse(str).toString();
+  return CryptoJS.enc.Base64.parse(str).toString(CryptoJS.enc.Utf8);
 }