diff --git a/commons/basic/src/main/ets/utils/ChangeUtil.ets b/commons/basic/src/main/ets/utils/ChangeUtil.ets
index 8adaf81..271c384 100644
--- a/commons/basic/src/main/ets/utils/ChangeUtil.ets
+++ b/commons/basic/src/main/ets/utils/ChangeUtil.ets
@@ -4,8 +4,8 @@ import { CryptoJS } from '@ohos/crypto-js';
 import { logger } from './logger';
 import image from '@ohos.multimedia.image';
 import fs from '@ohos.file.fs';
-
-
+import { fileIo } from '@kit.CoreFileKit';
+import util from '@ohos.util';
 export class ChangeUtil {
   /**
    * 将HashMap转成JsonString
@@ -57,6 +57,19 @@ export class ChangeUtil {
     return reg2.test(password);
   }
 
+
+  static async  convertUriToBase64(uri: string): Promise<string> {
+    // 打开文件并读取数据
+    const file = fileIo.openSync(uri, fileIo.OpenMode.READ_ONLY);
+    const stat = await fileIo.stat(file.fd);
+    const buffer = new ArrayBuffer(stat.size);
+    fileIo.readSync(file.fd, buffer);
+    fileIo.closeSync(file);
+
+    // 编码为 Base64
+    const base64Helper = new util.Base64Helper();
+    return base64Helper.encodeToStringSync(new Uint8Array(buffer));
+  }
   /**
    * 将图片转换为base64字符串
    * @param imageUri 图片URI