diff --git a/api/@ohos.securityLabel.d.ts b/api/@ohos.securityLabel.d.ts
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+/*
+* Copyright (C) 2021 Huawei Device Co., Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import {AsyncCallback, Callback} from "./basic";
+
+/**
+ * Provides securityLabel APIs
+ *
+ * @since 9
+ * @syscap  SystemCapability.FileManagement.File.FileIO
+ */
+
+declare namespace securityLabel {
+
+  type dataLevel = 's0'|'s1'|'s2'|'s3'|'s4';
+  /**
+   * set the SecurityLabel.
+   *
+   * @since 9
+   */
+  function setSecurityLabel(path:string, type:dataLevel, callback: AsyncCallback<void>): void;
+  function setSecurityLabel(path:string, type:dataLevel): Promise<void>;
+
+  /**
+   * set the SecurityLabelSync.
+   *
+   * @since 9
+   */
+   function setSecurityLabelSync(path:string, type:dataLevel): void;
+
+    /**
+   * get the SecurityLabel.
+   *
+   * @since 9
+   */
+  function getSecurityLabel(path:string, callback: AsyncCallback<string>): void;
+  function getSecurityLabel(path:string): Promise<string>;
+
+  /**
+   * get the SecurityLabelSync.
+   *
+   * @since 9
+   */
+   function getSecurityLabelSync(path:string): string;
+}
+
+export default securityLabel;
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