diff --git a/api/@internal/component/ets/scroll.d.ts b/api/@internal/component/ets/scroll.d.ts
index e26f0d44879bc274fb6464f12ccc2b1d58884c59..6b64949863669dafe4224277fc1d7b548417d3ee 100644
--- a/api/@internal/component/ets/scroll.d.ts
+++ b/api/@internal/component/ets/scroll.d.ts
@@ -716,6 +716,18 @@ declare class Scroller {
    */
   currentOffset() : OffsetResult;
 
+  /**
+   * Obtains the content size.
+   *
+   * @returns { SizeResult } Returns the content size.
+   * @throws { BusinessError } 100004 - Controller not bound to component.
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 22
+   */
+  contentSize() : SizeResult;
+
   /**
    * Called when sliding to the specified index.
    *