diff --git a/README.md b/README.md
index 0d5dc89..1fbacf4 100644
--- a/README.md
+++ b/README.md
@@ -358,7 +358,7 @@ Step 2.5: if c == CMD_PRINT then 打印数据
 Step 2.6: 
 
 
-![主程序流程图](picture-main.svg)
+![主程序流程图](picturemain.svg)
 
 
 #### save_data
diff --git a/picture-main.svg b/picturemain.svg
similarity index 100%
rename from picture-main.svg
rename to picturemain.svg