diff --git a/apps/mtm/services.py b/apps/mtm/services.py
index 1f32e264..1072983c 100644
--- a/apps/mtm/services.py
+++ b/apps/mtm/services.py
@@ -58,7 +58,7 @@ def daoru_material(path: str):
                 raise ParseError(f'{i}行物料信息错误: {str(e)}')
         try:
             filters = {'type': type, 'name': name, 'specification': specification,
-                       'model': model, 'unit': unit}
+                       'model': model, 'unit__iexact': unit}
             if type in [20, 30]:
                 filters['process'] = process
             default = filters