diff --git a/car/CustomAutocan.md b/car/CustomAutocan.md
index 84489ed..d356103 100644
--- a/car/CustomAutocan.md
+++ b/car/CustomAutocan.md
@@ -211,3 +211,9 @@ uint8_t can_crc8_calculate(uint8_t  *p  uint8_t counter)
     return(crc8);  
 } 
 ```
+
+## 6 跨平台串口工具
+
+推荐一款跨平台的串口工具Comtools: (https://github.com/Neutree/COMTool)
+
+![Comtools.png](./img/Comtools.png)
diff --git a/car/img/Comtools.png b/car/img/Comtools.png
new file mode 100644
index 0000000..7f4bc84
Binary files /dev/null and b/car/img/Comtools.png differ