diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index e35e33cc..19323c21 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -1283,13 +1283,12 @@ class ResMrpWorkOrder(models.Model):
                         workorder.state = 'waiting'
                         continue
                     purchase_orders_id = self._get_surface_technics_purchase_ids()
-                    location_id = self.env['stock.location'].search([('name', '=', '制造前')])
-                    quants = self.env['stock.quant'].search([
-                        ('product_id', '=', workorder.production_id.bom_id.bom_line_ids.product_id.id),
-                        ('location_id', '=', location_id.id)
-                    ])
-                    total_qty = sum(quants.mapped('quantity'))  # 计算该位置的总库存量
-                    if purchase_orders_id.state == 'purchase' and total_qty >= workorder.production_id.product_qty:
+                    purchase_count = 0
+                    for purchase_order in purchase_orders_id:
+                        for purchase_order_line in purchase_order.order_line:
+                            if purchase_order_line.product_id.server_product_process_parameters_id.id == workorder.surface_technics_parameters_id.id:
+                                purchase_count = purchase_order_line.product_qty
+                    if purchase_orders_id.state == 'purchase' and purchase_count>=workorder.production_id.product_qty:
                         workorder.state = 'ready'
                         picking_id = workorder.production_id.picking_ids.filtered(
                             lambda wk: wk.location_id.name == '制造前' and wk.location_dest_id.name == '外协加工区')