diff --git a/zh-cn/application-dev/media/image-decoding.md b/zh-cn/application-dev/media/image-decoding.md
index c4f366e30d4df22b6dd2e518e441e67c77df66e6..c5991b9a7863b320946f3f0a26162b488693bc15 100644
--- a/zh-cn/application-dev/media/image-decoding.md
+++ b/zh-cn/application-dev/media/image-decoding.md
@@ -100,11 +100,11 @@
 4. 设置解码参数DecodingOptions，解码获取PixelMap图片对象。
      
    ```ts
-   class decodingOption {
-      flag : boolean = true
-      n : number = 0
+   class DecodingOption {
+      editable : boolean = true
+      desiredPixelFormat : number = 0
    }
-   let decodingOptions = {
+   let decodingOptions : DecodingOption = {
        editable: true,
        desiredPixelFormat: 3,
    }