diff --git a/interfaces/kits/js/notification/notificationActionButton.d.ts b/interfaces/kits/js/notification/notificationActionButton.d.ts
index bf2549c696b2c4df105ace9c11ab2ae2d4968ea0..b2967c4626c391d915525657be1582e2e19ce0b6 100644
--- a/interfaces/kits/js/notification/notificationActionButton.d.ts
+++ b/interfaces/kits/js/notification/notificationActionButton.d.ts
@@ -4,7 +4,7 @@
  * 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
+ * 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,
diff --git a/interfaces/kits/js/notification/notificationContent.d.ts b/interfaces/kits/js/notification/notificationContent.d.ts
index d2cc36ebdc6e98670dfc6dc78c3071da0564e4f5..037300c24bfc8c1de315cb4dab649be24786488d 100644
--- a/interfaces/kits/js/notification/notificationContent.d.ts
+++ b/interfaces/kits/js/notification/notificationContent.d.ts
@@ -14,7 +14,9 @@
  */
 
 import notification from '../@ohos.notification';
-import image from './@ohos.multimedia.image';
+import image from '../@ohos.multimedia.image';
+import { MessageUser } from './notificationMessageUser';
+
 /**
  * Describes a normal text notification.
  *
@@ -119,6 +121,68 @@ export interface NotificationPictureContent extends NotificationBasicContent {
   picture: image.PixelMap;
 }
 
+/**
+ * Constructs a conversation-like notification that includes message communication among multiple users.
+ *
+ * @since 8
+ */
+export interface NotificationConversationalContent extends NotificationBasicContent {
+  /**
+   * Indicates the {@code MessageUser} who sends all objects in this conversation-like notification.
+   * This parameter cannot be null.
+   */
+  user: MessageUser;
+
+  /**
+   * Obtains all messages included in this conversation-like notification.
+   */
+  messages: Array<ConversationalMessage>;
+
+  /**
+   * Checks whether this notification represents a group conversation.
+   */
+  conversationGroup?: boolean;
+
+  /**
+   * Obtains the title to be displayed for the conversation.
+   */
+  conversationTitle?: string;
+}
+
+/**
+ * Provides methods for defining a conversational message that is used in notifications created with
+ * {@link NotificationConversationalContent}. Each message contains the message content, timestamp, and
+ * sender; and the message content and sender information will be displayed in the notification bar.
+ *
+ * @since 8
+ */
+export interface ConversationalMessage {
+  /**
+   * Obtains the text to be displayed as the content of this message.
+   */
+  text: string;
+
+  /**
+   * Obtains the time when this message arrived.
+   */
+  timestamp: number;
+
+  /**
+   * Obtains the sender of this message.
+   */
+  sender: MessageUser;
+
+  /**
+   * Obtains the MIME type of this message.
+   */
+  mimeType?: string;
+
+  /**
+   * Obtains the URI of this message.
+   */
+  uri?: string;
+}
+
 /**
  * Describes notification types.
  *
@@ -153,4 +217,11 @@ export interface NotificationContent {
    * Picture-attached notification.
    */
   picture?: NotificationPictureContent;
+
+  /**
+   * Constructs a conversation-like notification that includes message communication among multiple users.
+   *
+   * @since 8
+   */
+  conversation?: NotificationConversationalContent;
 }
diff --git a/interfaces/kits/js/notification/notificationMessageUser.d.ts b/interfaces/kits/js/notification/notificationMessageUser.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..40d01bde11edcb54e6bcbc6719089e6a37818c71
--- /dev/null
+++ b/interfaces/kits/js/notification/notificationMessageUser.d.ts
@@ -0,0 +1,57 @@
+/*
+ * 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 image from '../@ohos.multimedia.image';
+
+/**
+ * Represents a message sender that can be used by {@link NotificationRequest},
+ *
+ * @name MessageUser
+ * @since 8
+ * @devices phone, tablet, tv, wearable, car
+ * @permission N/A
+ * @sysCap SystemCapability.Notification.ANS
+ */
+export interface MessageUser {
+  /**
+   * Obtains the name of this {@code MessageUser}.
+   */
+  name: string;
+
+  /**
+   * Obtains the key of this {@code MessageUser}.
+   */
+  key: string;
+
+  /**
+   * Obtains the URI of this {@code MessageUser}.
+   */
+  uri: string;
+
+  /**
+   * Checks whether this {@code MessageUser} is important.
+   */
+  isMachine: boolean;
+
+  /**
+   * Checks whether this {@code MessageUser} is a machine.
+   */
+  isUserImportant: boolean;
+
+  /**
+   * Obtains the icon of this {@code MessageUser}.
+   */
+  icon?: image.PixelMap;
+}
diff --git a/interfaces/kits/js/notification/notificationRequest.d.ts b/interfaces/kits/js/notification/notificationRequest.d.ts
index ce183326fee650449a42828ef2fb1c7fdebcd735..6cefef3867a765a6abd5cd0e324b2d904af1b258 100644
--- a/interfaces/kits/js/notification/notificationRequest.d.ts
+++ b/interfaces/kits/js/notification/notificationRequest.d.ts
@@ -4,7 +4,7 @@
  * 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
+ * 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,
diff --git a/interfaces/kits/js/notification/notificationUserInput.d.ts b/interfaces/kits/js/notification/notificationUserInput.d.ts
index 1b44e878efec0ca8dc40b4a0fc78a93dbd384f12..389d1c43c713fbf53a07d47a753463212fae7e1b 100644
--- a/interfaces/kits/js/notification/notificationUserInput.d.ts
+++ b/interfaces/kits/js/notification/notificationUserInput.d.ts
@@ -4,7 +4,7 @@
  * 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
+ * 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,
@@ -17,7 +17,7 @@
  * Describes a NotificationUserInput instance.
  *
  * @name NotificationUserInput
- * @since 7
+ * @since 8
  * @devices phone, tablet, tv, wearable, car
  * @permission N/A
  * @sysCap SystemCapability.Notification.ANS
@@ -27,4 +27,29 @@ export interface NotificationUserInput {
    * Obtains the key used to identify this input when the input is collected from the user.
    */
   inputKey: string;
+
+  /**
+   * Obtains the tag to be displayed to the user when collecting this input from the user.
+   */
+  tag: string;
+
+  /**
+   * Obtains the options provided to users to satisfy user input needs. All options are displayed in a single line.
+   */
+  options: Array<string>;
+
+  /**
+   * Obtains whether users can input values of the given MIME type.
+   */
+  permitMimeTypes?: Array<string>;
+
+  /**
+   * Obtains the edit type of the options provided by this {@code NotificationUserInput} object.
+   */
+  editType?: number;
+
+  /**
+   * Obtains additional data to this NotificationUserInput.
+   */
+  additionalData?: {[key: string]: Object};
 }