diff --git a/api/@ohos.data.relationalStore.d.ts b/api/@ohos.data.relationalStore.d.ts
index a47fbcfabc74e8709479beb41450bef3820107b7..e616360be8e8758a42c7f7d83f748e43f0bd9cda 100644
--- a/api/@ohos.data.relationalStore.d.ts
+++ b/api/@ohos.data.relationalStore.d.ts
@@ -4333,6 +4333,28 @@ declare namespace relationalStore {
      */
     batchInsertWithConflictResolutionSync(table: string, values: Array<ValuesBucket>, conflict: ConflictResolution): number;
 
+    /**
+     * Changes the key used to encrypt the database.
+     *
+     * @param { CryptoParam } cryptoParam - Crypto parameters.
+     * @returns { Promise<void> } - Promise that returns no value.
+     * @throws { BusinessError } 801 - Capability not supported.
+     * @throws { BusinessError } 14800011 - Database corrupted.
+     * @throws { BusinessError } 14800014 - Already closed.
+     * @throws { BusinessError } 14800015 - The database does not respond.
+     * @throws { BusinessError } 14800021 - SQLite: Generic error.
+     * @throws { BusinessError } 14800023 - SQLite: Access permission denied.
+     * @throws { BusinessError } 14800024 - SQLite: The database file is locked.
+     * @throws { BusinessError } 14800026 - SQLite: The database is out of memory.
+     * @throws { BusinessError } 14800027 - SQLite: Attempt to write a readonly database.
+     * @throws { BusinessError } 14800028 - SQLite: Some kind of disk I/O error occurred.
+     * @throws { BusinessError } 14800029 - SQLite: The database is full.
+     * @syscap SystemCapability.DistributedDataManager.RelationalStore.Core
+     * @crossplatform
+     * @since 20
+     */
+    rekey(cryptoParam?: CryptoParam): Promise<void>;
+
     /**
      * Updates data in the database based on a specified instance object of RdbPredicates.
      *