diff --git a/sf_demand_plan/models/sf_demand_plan.py b/sf_demand_plan/models/sf_demand_plan.py
index b57ed713..45b60ab5 100644
--- a/sf_demand_plan/models/sf_demand_plan.py
+++ b/sf_demand_plan/models/sf_demand_plan.py
@@ -2,6 +2,7 @@
 
 from odoo import models, fields, api, _
 from odoo.tools import float_compare
+from odoo.exceptions import ValidationError
 
 
 class SfDemandPlan(models.Model):
@@ -178,3 +179,16 @@ class SfDemandPlan(models.Model):
                 line.state = '30'
             else:
                 line.state = '10'
+
+    def write(self, vals):
+        res = super(SfDemandPlan, self).write(vals)
+        line_ids = self.line_ids.filtered(lambda p: p.plan_uom_qty == 0 or p.plan_uom_qty < 0)
+        if line_ids:
+            raise ValidationError(f"计划量不能小于等于0")
+        if 'line_ids' in vals:
+            for line in self.line_ids:
+                if not line.sale_order_id:
+                    line.sale_order_id = self.sale_order_id
+                if not line.sale_order_line_id:
+                    line.sale_order_line_id = self.sale_order_line_id
+        return res