diff --git a/doc/26.TencentOS_tiny_EVB_WL_Quick_Start.md b/doc/26.TencentOS_tiny_EVB_WL_Quick_Start.md
index e5e67dee9456f9af364386fd07abd7c1f0539d63..655652ffcd64137e8547029628b3a6f6ef92bf96 100644
--- a/doc/26.TencentOS_tiny_EVB_WL_Quick_Start.md
+++ b/doc/26.TencentOS_tiny_EVB_WL_Quick_Start.md
@@ -446,7 +446,7 @@ https://github.com/Tencent/TencentOS-tiny
 点击选择 OB 图标按钮，按照图中流程进行解锁：
 
 ![](./image/EVB_WL_guide/cubemx_prog_step2.png)
-
+注意STLink需要连接4线(vcc,swdio,swclk,gnd),按住板子的复位键，然后再点击 Connect，然后释放复位键。
 成功之后点击 dicconnnect 断开连接：
 
 ![](./image/EVB_WL_guide/cubemx_prog_step3.png)