diff --git a/harmony_utils/src/main/ets/utils/PreferencesUtil.ets b/harmony_utils/src/main/ets/utils/PreferencesUtil.ets
index b7bf7da6e96275121896a9aec7c127505cc59d04..51ec4374165b9a248a1f71092354a5cd1b86ba04 100644
--- a/harmony_utils/src/main/ets/utils/PreferencesUtil.ets
+++ b/harmony_utils/src/main/ets/utils/PreferencesUtil.ets
@@ -7,13 +7,12 @@ import { AppUtil } from './AppUtil'
  * Preferences工具类
  */
 export class PreferencesUtil {
-
-  private constructor() {}
+  private constructor() {
+  }
 
   private static defaultPreferenceName: string = "SP_HARMONY_UTILS_PREFERENCES"
   private static preferences: preferences.Preferences
 
-
   /**
    * 获取Preferences实例
    * @param name
@@ -101,8 +100,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static getStringSync(key: string): string {
-    return PreferencesUtil.getSync(key, "") as string;
+  static getStringSync(key: string, defaultVal?: string): string {
+    return PreferencesUtil.getSync(key, defaultVal ?? "") as string;
   }
 
   /**
@@ -110,8 +109,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static async getString(key: string): Promise<string> {
-    return (await PreferencesUtil.get(key, "")) as string;
+  static async getString(key: string, defaultVal?: string): Promise<string> {
+    return (await PreferencesUtil.get(key, defaultVal ?? "")) as string;
   }
 
 
@@ -120,8 +119,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static getNumberSync(key: string): number {
-    return PreferencesUtil.getSync(key, 0) as number;
+  static getNumberSync(key: string, defaultVal?: number): number {
+    return PreferencesUtil.getSync(key, defaultVal ?? 0) as number;
   }
 
   /**
@@ -129,8 +128,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static async getNumber(key: string): Promise<number> {
-    return (await PreferencesUtil.get(key, 0)) as number;
+  static async getNumber(key: string, defaultVal?: number): Promise<number> {
+    return (await PreferencesUtil.get(key, defaultVal ?? 0)) as number;
   }
 
 
@@ -139,8 +138,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static getBooleanSync(key: string): boolean {
-    return PreferencesUtil.getSync(key, false) as boolean;
+  static getBooleanSync(key: string, defaultVal?: boolean): boolean {
+    return PreferencesUtil.getSync(key, defaultVal ?? false) as boolean;
   }
 
   /**
@@ -148,8 +147,8 @@ export class PreferencesUtil {
    * @param key
    * @returns
    */
-  static async getBoolean(key: string): Promise<boolean> {
-    return (await PreferencesUtil.get(key, false)) as boolean;
+  static async getBoolean(key: string, defaultVal?: boolean): Promise<boolean> {
+    return (await PreferencesUtil.get(key, defaultVal ?? false)) as boolean;
   }
 
 
@@ -229,6 +228,4 @@ export class PreferencesUtil {
   static deletePreferences(context: Context, name: string) {
     dataPreferences.deletePreferences(context, name);
   }
-
-
 }
\ No newline at end of file