diff --git a/api/@ohos.app.form.FormExtensionAbility.d.ts b/api/@ohos.app.form.FormExtensionAbility.d.ts
index 8eb3e5f9f94f33061bd7543bbfc5f7d8c46164cc..65f224550023b837a93ec42fb915d0c1d73c3c75 100644
--- a/api/@ohos.app.form.FormExtensionAbility.d.ts
+++ b/api/@ohos.app.form.FormExtensionAbility.d.ts
@@ -338,5 +338,20 @@ declare class FormExtensionAbility {
    * @since 20
    */
   onFormLocationChanged(formId: string, newLocation: formInfo.FormLocation): void;
+
+  /**
+   * Called to notify the form provider that the size of the form has been changed. Override this method if
+   * you want to know the form size be changed, used for data continuity and layout refresh.
+   *
+   * @param { string } formId - Indicates the ID of the form.
+   * @param { string } newDimension - Indicates the new dimension of the form.
+   * @param { formInfo.Rect } newRect - Indicates the new rect(vp) of the form.
+   * 
+   * @syscap SystemCapability.Ability.Form
+   * @stagemodelonly
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  onSizeChanged(formId: string, newDimension: string, newRect: formInfo.Rect): void;
 }
 export default FormExtensionAbility;
diff --git a/api/@ohos.app.form.formHost.d.ts b/api/@ohos.app.form.formHost.d.ts
index cb7a9402a3de617a456a10315fbae2ee9f30e7bf..60469fbdd6955bec94b1bf4097b14c9582afb131 100644
--- a/api/@ohos.app.form.formHost.d.ts
+++ b/api/@ohos.app.form.formHost.d.ts
@@ -1274,5 +1274,23 @@ declare namespace formHost {
    * @since 12
    */
   function updateFormLocation(formId: string, location: formInfo.FormLocation): void;
+
+  /**
+   * Update size of the form.
+   *
+   * @permission ohos.permission.REQUIRE_FORM
+   * @param { string } formId - Indicates the form id.
+   * @param { string } newDimension - The new dimension of the form.
+   * @param { formInfo.Rect } newRect - The new size of the form.
+   * @throws { BusinessError } 201 - Permissions denied.
+   * @throws { BusinessError } 202 - caller is not system app.
+   * @throws { BusinessError } 801 - Capability not supported.function requestOverRange can not work correctly
+   *    due to limited device capabilities.
+   * @syscap SystemCapability.Ability.Form
+   * @systemapi
+   * @since 20
+   * @arkts 1.2
+   */
+  function updateFormSize(formId: string, newDimension: string, newRect: formInfo.Rect): void;
 }
 export default formHost;
diff --git a/api/@ohos.app.form.formInfo.d.ts b/api/@ohos.app.form.formInfo.d.ts
index c6c6e9245bc506618b3bef00cfa9932114d7438f..51400ba478e88f8dce1a2c3224b5fceb06343177 100644
--- a/api/@ohos.app.form.formInfo.d.ts
+++ b/api/@ohos.app.form.formInfo.d.ts
@@ -472,6 +472,30 @@ declare namespace formInfo {
      * @since 20
      */
     readonly sceneAnimationParams?: SceneAnimationParams;
+
+    /**
+     * Obtains the resizable of the form.
+     *
+     * @type { ?boolean }
+     * @readonly
+     * @syscap SystemCapability.Ability.Form
+     * @systemapi
+     * @since 20
+     * @arkts 1.2
+     */
+    readonly resizable?: boolean;
+
+    /**
+     * Obtains the group id of the form.
+     *
+     * @type { ?string }
+     * @readonly
+     * @syscap SystemCapability.Ability.Form
+     * @systemapi
+     * @since 20
+     * @arkts 1.2
+     */
+    readonly groupId?: string;
   }
 
   /**