diff --git a/sell/models/sell_order.py b/sell/models/sell_order.py
index 848b14d7c..e582d4c30 100644
--- a/sell/models/sell_order.py
+++ b/sell/models/sell_order.py
@@ -79,6 +79,16 @@ def _compute_delivery(self):
         for order in self:
             order.delivery_count = len([deli for deli in order.delivery_ids if not deli.is_return])
             order.return_count = len([deli for deli in order.delivery_ids if deli.is_return])
+    
+    @api.one
+    @api.depends('partner_id','partner_id.responsible_id')
+    def _get_sell_user(self):
+        '''计算销售单据的业务员，不允许修改'''
+        if self.partner_id:
+            if self.partner_id.responsible_id:
+                self.user_id = self.partner_id.responsible_id
+            else:
+                self.user_id = self._uid
 
     partner_id = fields.Many2one('partner', u'客户',
                                  ondelete='restrict', states=READONLY_STATES,
@@ -93,8 +103,9 @@ def _compute_delivery(self):
     user_id = fields.Many2one(
         'res.users',
         u'销售员',
-        ondelete='restrict',
+        ondelete='restrict',store=True,
         states=READONLY_STATES,
+        computer='_get_sell_user',
         help=u'单据经办人',
     )
     date = fields.Date(u'单据日期',
@@ -200,10 +211,6 @@ def onchange_partner_address(self):
         if self.address_id:
             self.contact = self.address_id.contact
             self.mobile = self.address_id.mobile
-        if self.partner_id.responsible_id:
-            self.user_id = self.partner_id.responsible_id
-        else:
-            self.user_id = self._uid
 
     @api.onchange('partner_id')
     def onchange_partner_id(self):