diff --git a/widgets/main_window.py b/widgets/main_window.py
index 2fd2088..ecb7208 100644
--- a/widgets/main_window.py
+++ b/widgets/main_window.py
@@ -1760,7 +1760,7 @@ class MainWindow(MainWindowUI):
             except (ValueError, TypeError):
                 logging.warning(f"无法将工字轮重量 '{gzl_zl_raw}' 转换为浮点数，将使用默认值 0.0")
 
-            net_weight_kg = weight_kg - gzl_zl
+            net_weight_kg = round(weight_kg - gzl_zl,3)
             self.save_inspection_data(self._current_order_code, gc_note, tray_id, 13, 13, str(net_weight_kg), "pass")
 
             # 设置净重单元格（显示千克）