diff --git a/backend/ruff.toml b/backend/ruff.toml
index b094f9a7..0a81f2be 100644
--- a/backend/ruff.toml
+++ b/backend/ruff.toml
@@ -1,5 +1,5 @@
 # 限制每行最多20个字符
-line-length = 500
+line-length = 320
 lint.select = ["F","E","W","UP"]
 
 [format]