diff --git a/app_product_weight_sale/models/sale_order_line.py b/app_product_weight_sale/models/sale_order_line.py
index b91f3e56..224fd83c 100644
--- a/app_product_weight_sale/models/sale_order_line.py
+++ b/app_product_weight_sale/models/sale_order_line.py
@@ -11,7 +11,7 @@ class SaleOrderLine(models.Model):
 
     # 显示的单位，影响性能暂时不使用
     # weight_uom_name = fields.Char(string='Weight Measure', related='product_id.weight_uom_id.name', readonly=True)
-    weight = fields.Float(string='Weight', compute='_compute_weight', readonly=True)
+    weight = fields.Float(string='Weight', compute='_compute_weight', store=True)
     weight_subtotal = fields.Float(string='Weight Subtotal', compute='_compute_weight', store=True)
 
     @api.multi