diff --git a/Tools/ModelTranslator/model_decimate.py b/Tools/ModelTranslator/model_decimate.py
index f331dac7..f5020e45 100644
--- a/Tools/ModelTranslator/model_decimate.py
+++ b/Tools/ModelTranslator/model_decimate.py
@@ -1,6 +1,6 @@
 """FBX 减面 CLI：减到指定三角面数并重展 UV（seam 展开 + UVPM4 排布），输出 <名>_low.fbx。
 用法：python model_decimate.py src/well1500.fbx --tris 5000 [-o dir]
-     [--unwrap seam|smart] [--blender exe]"""
+     [--unwrap seam|smart] [--max-overlap 0.15] [--blender exe]"""
 import argparse
 import os