diff --git a/api/@internal/component/ets/form_component.d.ts b/api/@internal/component/ets/form_component.d.ts
index 26d1e03d82787918c9424115c4b952b436de181a..0b44fe424c0e785f725998cd72a36224180bfcc4 100644
--- a/api/@internal/component/ets/form_component.d.ts
+++ b/api/@internal/component/ets/form_component.d.ts
@@ -69,6 +69,7 @@ declare enum FormDimension {
    * @syscap SystemCapability.ArkUI.ArkUI.Full
    * @systemapi
    * @since 9
+   * @deprecated since 20
    */
   Dimension_2_1,
 
diff --git a/api/@ohos.app.form.formInfo.d.ts b/api/@ohos.app.form.formInfo.d.ts
index b281d1163bf611c30ed1d2eed68f67dc1e69d13a..ee8da30ab241946d2511d131f2d43df608253cf1 100644
--- a/api/@ohos.app.form.formInfo.d.ts
+++ b/api/@ohos.app.form.formInfo.d.ts
@@ -1301,6 +1301,7 @@ declare namespace formInfo {
      * @syscap SystemCapability.Ability.Form
      * @atomicservice
      * @since 11
+     * @deprecated since 20
      */
     Dimension_2_1,