diff --git a/api/@ohos.multimodalInput.inputDeviceCooperate.d.ts b/api/@ohos.multimodalInput.inputDeviceCooperate.d.ts
index b0ae78993a0a609754d534c0ed954861bf050619..58d7d7d70e0e3a69cf773fec0a8850d9605f8b7a 100644
--- a/api/@ohos.multimodalInput.inputDeviceCooperate.d.ts
+++ b/api/@ohos.multimodalInput.inputDeviceCooperate.d.ts
@@ -82,6 +82,56 @@ declare namespace inputDeviceCooperate {
     MSG_COOPERATE_STATE_OFF = 501,
   }
 
+  /**
+   * Represents the status of the mouse traversal switch.
+   *
+   * @interface TraversalSwitchStatus
+   * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  interface TraversalSwitchStatus {
+    /**
+     * Indicates status of the mouse traversal switch.
+     *
+     * @type { boolean }
+     * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+     * @systemapi hide for inner use
+     * @since 20
+     */
+    state: boolean;
+  }
+
+  /**
+   * Represents the data received in the mouse traversal event callback.
+   *
+   * @interface CooperationCallbackData
+   * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+   * @systemapi hide for inner use
+   * @since 20 
+   */
+  interface CooperationCallbackData {
+    /**
+     * Descriptor of the device involved in the mouse traversal event.
+     *
+     * @type { string }
+     * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+     * @systemapi hide for inner use
+     * @since 20
+     */
+    deviceDescriptor: string;
+
+    /**
+     * Details of the cooperation event message.
+     *
+     * @type { EventMsg }
+     * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+     * @systemapi hide for inner use
+     * @since 20
+     */
+    eventMsg: EventMsg;
+  }
+
   /**
    * Enable or disable the mouse traversal.
    *
@@ -259,7 +309,19 @@ declare namespace inputDeviceCooperate {
    * @systemapi hide for inner use
    * @since 12
    */
-  function getState(deviceDescriptor: string, callback: AsyncCallback<{ state: boolean }>): void;
+  /**
+   * Obtains the status of the mouse traversal switch.
+   *
+   * @param {string} deviceDescriptor Descriptor of the target network for mouse traversal.
+   * @param {AsyncCallback<TraversalSwitchStatus>} callback Asynchronous callback used to receive the status of the mouse traversal switch.
+   * @throws { BusinessError } 202 - Permission denied, non-system app called system api.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;
+   * <br>2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  function getState(deviceDescriptor: string, callback: AsyncCallback<TraversalSwitchStatus>): void;
 
   /**
    * Obtains the status of the mouse traversal switch.
@@ -284,7 +346,19 @@ declare namespace inputDeviceCooperate {
    * @systemapi hide for inner use
    * @since 12
    */
-  function getState(deviceDescriptor: string): Promise<{ state: boolean }>;
+  /**
+   * Obtains the status of the mouse traversal switch.
+   *
+   * @param {string} deviceDescriptor Descriptor of the target network for mouse traversal.
+   * @returns { Promise<TraversalSwitchStatus> } A promise used by returning state
+   * @throws { BusinessError } 202 - Permission denied, non-system app called system api.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;
+   * <br>2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  function getState(deviceDescriptor: string): Promise<TraversalSwitchStatus>;
 
   /**
    * Enables listening for mouse traversal events.
@@ -309,7 +383,19 @@ declare namespace inputDeviceCooperate {
    * @systemapi hide for inner use
    * @since 12
    */
-  function on(type: 'cooperation', callback: AsyncCallback<{ deviceDescriptor: string, eventMsg: EventMsg }>): void;
+  /**
+   * Enables listening for mouse traversal events.
+   * 
+   * @param { 'cooperation' } type Registration type.
+   * @param { AsyncCallback<CooperationCallbackData> } callback Asynchronous callback used to receive mouse traversal events.
+   * @throws { BusinessError } 202 - Permission denied, non-system app called system api.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;
+   * <br>2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.MultimodalInput.Input.Cooperator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  function on(type: 'cooperation', callback: AsyncCallback<CooperationCallbackData>): void;
 
   /**
    * Disables listening for mouse traversal events.
diff --git a/api/@ohos.multimodalInput.inputEventClient.d.ts b/api/@ohos.multimodalInput.inputEventClient.d.ts
index fc4b4d1811a0659e0d4c8891e30cf71b847b33ad..af61b31baeb5d19cae8f68f8dd190f2daea8ba54 100644
--- a/api/@ohos.multimodalInput.inputEventClient.d.ts
+++ b/api/@ohos.multimodalInput.inputEventClient.d.ts
@@ -135,6 +135,26 @@ declare namespace inputEventClient {
     keyEvent: KeyEvent;
   }
 
+  /**
+   * Defines info of key that user want to inject.
+   *
+   * @interface KeyEventInfo
+   * @syscap SystemCapability.MultimodalInput.Input.InputSimulator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  interface KeyEventInfo {
+    /**
+     * Inject key event.
+     *
+     * @type { KeyEvent }
+     * @syscap SystemCapability.MultimodalInput.Input.InputSimulator
+     * @systemapi hide for inner use
+     * @since 20
+     */
+    KeyEvent: KeyEvent;
+  }
+
   /**
    * Inject system keys.
    *
@@ -184,7 +204,20 @@ declare namespace inputEventClient {
    * @systemapi hide for inner use
    * @since 12
    */
-  function injectEvent({ KeyEvent: KeyEvent }): void;
+  /**
+   * Inject system keys.
+   *
+   * @permission ohos.permission.INJECT_INPUT_EVENT
+   * @param { KeyEventInfo } KeyEvent - the key event to be injected.
+   * @throws { BusinessError } 201 - Permission denied.
+   * @throws { BusinessError } 202 - Permission denied, non-system app called system api.
+   * @throws { BusinessError } 401 - Parameter error. Possible causes: 1. Mandatory parameters are left unspecified;
+   * <br>2. Incorrect parameter types; 3. Parameter verification failed.
+   * @syscap SystemCapability.MultimodalInput.Input.InputSimulator
+   * @systemapi hide for inner use
+   * @since 20
+   */
+  function injectEvent( KeyEvent: KeyEventInfo ): void;
 
   /**
    * Inject mouse event.