diff --git a/docs/data_description.md b/docs/data_description.md
index 1cd4311..b3c92ae 100644
--- a/docs/data_description.md
+++ b/docs/data_description.md
@@ -57,7 +57,7 @@ RoRD 模型 ‑ 完整数据说明
 
 ────────────────────────────────────  
 三、目录结构示范  
-
+```
 project_root/  
 ├── train/  
 │   └── layouts/  
@@ -74,7 +74,7 @@ project_root/
 │   └── annotations/  
 │       ├── chip1.json  
 │       └── chip2.json  
-
+```
 ────────────────────────────────────  
 四、常见问题速查