diff --git a/zh-cn/application-dev/media/image-decoding.md b/zh-cn/application-dev/media/image-decoding.md
index 01438f611587fa5103afa2b65fdc91bdb6637487..f2dba2da1ed3f0fecdb0f278552c7fdd274022f7 100644
--- a/zh-cn/application-dev/media/image-decoding.md
+++ b/zh-cn/application-dev/media/image-decoding.md
@@ -144,3 +144,9 @@
    ```ts
    const pixelMap = await imageSource.createPixelMap();
    ```
+
+5. 释放pixelMap。
+
+   ```ts
+   pixelMap.release();
+   ```