diff --git a/zh-cn/application-dev/dfx/errormanager-guidelines.md b/zh-cn/application-dev/dfx/errormanager-guidelines.md
index cbb8f9a72b4fe3f6ad483f67304b2e9053a5e0bb..0e98bee1dc30fdf4f0aa389bb5cad4900510ca1e 100644
--- a/zh-cn/application-dev/dfx/errormanager-guidelines.md
+++ b/zh-cn/application-dev/dfx/errormanager-guidelines.md
@@ -35,7 +35,7 @@
 | -2     | 参数错误       |
 
 ## 开发示例
-````
+```ts
 import Ability from '@ohos.application.Ability'
 import errorManager from '@ohos.application.errorManager'
 
@@ -87,4 +87,4 @@ export default class MainAbility extends Ability {
         console.log("[Demo] MainAbility onBackground")
     }
 };
-````
\ No newline at end of file
+```
\ No newline at end of file