diff --git a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/MapperConfig.java b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/MapperConfig.java
index 2786fb6a1..a3fb4ba60 100644
--- a/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/MapperConfig.java
+++ b/headless/chat/src/main/java/com/tencent/supersonic/headless/chat/mapper/MapperConfig.java
@@ -28,7 +28,7 @@ public class MapperConfig extends ParameterConfig {
     public static final Parameter MAPPER_NAME_THRESHOLD =
             new Parameter(
                     "s2.mapper.name.threshold",
-                    "0.3",
+                    "0.5",
                     "指标名、维度名文本相似度阈值",
                     "文本片段和匹配到的指标、维度名计算出来的编辑距离阈值, 若超出该阈值, 则舍弃",
                     "number",