diff --git a/Tools/ModelTranslator/bl_decimate.py b/Tools/ModelTranslator/bl_decimate.py
index 21a309e0..34c7f63f 100644
--- a/Tools/ModelTranslator/bl_decimate.py
+++ b/Tools/ModelTranslator/bl_decimate.py
@@ -33,6 +33,11 @@ def uv_gate_ok(flipped, overlap):
     return flipped <= UV_FLIP_TOL and (overlap or 0.0) <= UV_OVERLAP_TOL
 
 
+def uvpm_mode_label(base, applied):
+    """UV 模式标注：UVPackmaster 排布生效时加 +uvpm 后缀。"""
+    return base + "+uvpm" if applied else base
+
+
 def count_islands(n_faces, adjacent_pairs):
     """union-find 数 UV 岛：n_faces 个面，adjacent_pairs 为 UV 连续的面索引对。"""
     parent = list(range(n_faces))
diff --git a/Tools/ModelTranslator/tests/test_bl_decimate.py b/Tools/ModelTranslator/tests/test_bl_decimate.py
index c73ca1bb..daa24ba8 100644
--- a/Tools/ModelTranslator/tests/test_bl_decimate.py
+++ b/Tools/ModelTranslator/tests/test_bl_decimate.py
@@ -92,5 +92,16 @@ class TestUvGateOk(unittest.TestCase):
         self.assertTrue(bd.uv_gate_ok(0.01, None))
 
 
+class TestUvpmModeLabel(unittest.TestCase):
+    def test_applied_appends_suffix(self):
+        self.assertEqual(bd.uvpm_mode_label("seam", True), "seam+uvpm")
+        self.assertEqual(bd.uvpm_mode_label("smart", True), "smart+uvpm")
+        self.assertEqual(bd.uvpm_mode_label("smart_fallback", True), "smart_fallback+uvpm")
+
+    def test_not_applied_keeps_base(self):
+        self.assertEqual(bd.uvpm_mode_label("seam", False), "seam")
+        self.assertEqual(bd.uvpm_mode_label("smart_fallback", False), "smart_fallback")
+
+
 if __name__ == "__main__":
     unittest.main()