diff --git a/api/common/@system.notification.d.ts b/api/common/@system.notification.d.ts
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+/*
+ * Copyright (c) 2021-2022 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.
+ */
+
+/**
+ * @name ActionResult
+ * @since 3
+ * @syscap SystemCapability.Notification.Notification
+ */
+export interface ActionResult {
+  /**
+   * Bundle name of the application to be redirected to after the notification is clicked.
+   */
+  bundleName: string;
+
+  /**
+   * Ability name of the application to be redirected to after the notification is clicked.
+   */
+  abilityName: string;
+
+  /**
+   * URI of the page to be redirected to. The supported URI formats are as follows:
+   * 1. Absolute path of the page, which is provided by the pages list in the config.json file. Example:
+   * pages/index/index
+   * pages/detail/detail
+   * 2. Particular path. If the value is a slash (/), the home page is displayed.
+   */
+  uri: string;
+}
+
+/**
+ * @name ShowNotificationOptions
+ * @since 3
+ * @syscap SystemCapability.Notification.Notification
+ */
+export interface ShowNotificationOptions {
+  /**
+   * Notification title.
+   */
+  contentTitle?: string;
+
+  /**
+   * Notification content.
+   */
+  contentText?: string;
+
+  /**
+   * Action triggered after the notification is clicked.
+   */
+  clickAction?: ActionResult;
+}
+
+/**
+ * @name Notification
+ * @since 3
+ * @syscap SystemCapability.Notification.Notification
+ */
+export default class Notification {
+  /**
+   * Displays the notification.
+   * @param options Options.
+   */
+  static show(options?: ShowNotificationOptions): void;
+}