diff --git a/zh-cn/application-dev/reference/apis/js-apis-print.md b/zh-cn/application-dev/reference/apis/js-apis-print.md
index 9a90a9e98215027a5e0b1b4c78b06b4c47f8befc..4ebadbc8833a1f786271c85c5a34f79904711331 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-print.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-print.md
@@ -186,7 +186,7 @@ import { BusinessError } from '@ohos.base';
 let file = ['file://data/print/a.png', 'file://data/print/b.png'];
 // 或者传入fd
 // let file = ['fd://1', 'fd://2'];
-print.print(file).then((printTask) => {
+print.print(file).then((printTask: print.PrintTask) => {
   printTask.on('succeed', () => {
     console.log('print state is succeed');
   })