diff --git a/docs/zh/06-advanced/06-TDgpt/05-anomaly-detection/02-statistics-approach.md b/docs/zh/06-advanced/06-TDgpt/05-anomaly-detection/02-statistics-approach.md
index 73634db387..4847958a98 100644
--- a/docs/zh/06-advanced/06-TDgpt/05-anomaly-detection/02-statistics-approach.md
+++ b/docs/zh/06-advanced/06-TDgpt/05-anomaly-detection/02-statistics-approach.md
@@ -39,7 +39,7 @@ ANOMALY_WINDOW(foo.i32, "algo=grubbs")
 |参数|说明|是否必选|默认值|
 |---|---|---|---|
 |direction|异常检测方向类型('pos' / 'neg' / 'both')|否|"both"|
-|max_anoms|异常值比例 $1 \le K \le 49.9$|否|0.05|
+|max_anoms|异常值比例 $0 < K \le 49.9$|否|0.05|
 
 
 ```SQL