diff --git a/zh-cn/application-dev/reference/apis/js-apis-fileio.md b/zh-cn/application-dev/reference/apis/js-apis-fileio.md
index 074f5a954c6c18c569e3d00a76e3f9d484687480..10fe1daa80d09c7fbd2556fd96a6197c1513bb01 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-fileio.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-fileio.md
@@ -1221,7 +1221,7 @@ ftruncateSync(fd: number, len?: number): void
 
 - 示例：
   ```js
-  fileio.ftruncate(fd, len);
+  fileio.ftruncateSync(fd, len);
   ```
 
 
@@ -1293,7 +1293,7 @@ truncateSync(path: string, len?: number): void
 
 - 示例：
   ```js
-  fileio.ftruncate(path, len);
+  fileio.truncateSync(path, len);
   ```