diff --git a/en/device-dev/driver/driver-platform-pin-develop.md b/en/device-dev/driver/driver-platform-pin-develop.md
index e85936af7dff542a8a4a695d34bd3823b3b66ec8..1f78177ec912ea73e230ec02252c99b0cd56862f 100644
--- a/en/device-dev/driver/driver-platform-pin-develop.md
+++ b/en/device-dev/driver/driver-platform-pin-develop.md
@@ -204,7 +204,7 @@ The following uses **pin_hi35xx.c** as an example to present the content to be p
      };
      ```
      
-   - Init function
+   - **Init** function
    
      Input parameters:
    
@@ -287,7 +287,7 @@ The following uses **pin_hi35xx.c** as an example to present the content to be p
         }
 
    
-   - Release function
+   - **Release** function
 
         Input parameters: