diff --git a/api/@ohos.data.preferences.d.ts b/api/@ohos.data.preferences.d.ts
index c5755371035728dbc700781e0828ffed10645373..fce3a5ccad22d0bb9d9d1b4d5afd1e080a3d9488 100644
--- a/api/@ohos.data.preferences.d.ts
+++ b/api/@ohos.data.preferences.d.ts
@@ -99,6 +99,15 @@ declare namespace preferences {
         get(key: string, defValue: ValueType, callback: AsyncCallback<ValueType>): void;
         get(key: string, defValue: ValueType): Promise<ValueType>;
 
+        /**
+        * Obtains all values of a preferences.
+        *
+        * @throws BusinessError if invoked failed
+        * @since 8
+        */
+        getAll(callback: AsyncCallback<Array<{ key: string, value: ValueType }>>): void;
+        getAll(): Promise<Array<{ key: string, value: ValueType }>>;
+
         /**
          * Checks whether the {@link Preferences} object contains a preferences matching a specified key.
          *