diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index 011482d9..e35e33cc 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -1283,7 +1283,13 @@ class ResMrpWorkOrder(models.Model):
                         workorder.state = 'waiting'
                         continue
                     purchase_orders_id = self._get_surface_technics_purchase_ids()
-                    if purchase_orders_id.state == 'purchase':
+                    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:
                         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')