diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index 24bad9e7..6e0f1422 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -137,7 +137,9 @@ class ResMrpWorkOrder(models.Model):
     glb_file = fields.Binary("glb模型文件", related='production_id.model_file')
     is_subcontract = fields.Boolean(string='是否外协')
     surface_technics_parameters_id = fields.Many2one('sf.production.process.parameter', string="表面工艺可选参数")
-    picking_ids = fields.Many2many('stock.picking', string='外协出入库单')
+
+    picking_ids = fields.Many2many('stock.picking', string='外协出入库单', compute='_compute_surface_technics_picking_ids')
+
     purchase_id = fields.Many2many('purchase.order', string='外协采购单')
     surface_technics_picking_count = fields.Integer("外协出入库", compute='_compute_surface_technics_picking_ids')
     surface_technics_purchase_count = fields.Integer("外协采购", compute='_compute_surface_technics_purchase_ids')