diff --git a/src/config/official_configs.py b/src/config/official_configs.py
index ab8b4d27..9d50709c 100644
--- a/src/config/official_configs.py
+++ b/src/config/official_configs.py
@@ -648,7 +648,7 @@ class ResponseSplitterConfig(ConfigBase):
     enable_ai_segmentation: bool = False
     """是否启用AI智能分段"""
 
-    ai_segmentation_style: str = "natural"
+    ai_segmentation_style: Literal["natural", "conservative", "active"] = "natural"
     """AI智能分段风格：natural(自然), conservative(保守), active(活跃)"""