diff --git a/sf_manufacturing/models/mrp_production.py b/sf_manufacturing/models/mrp_production.py
index eac183d7..65b51fee 100644
--- a/sf_manufacturing/models/mrp_production.py
+++ b/sf_manufacturing/models/mrp_production.py
@@ -1656,12 +1656,13 @@ class MrpProduction(models.Model):
                         lambda s: s.manual_product_model_type_id.id == production.product_id.product_model_type_id.id
                     )
                 if production.production_type == '自动化产线加工':
-                    for k in (production.product_id.model_processing_panel.split(',')):
-                        for route in product_routing_workcenter:
-                            i += 1
-                            technology_design_values.append(
-                                self.env['sf.technology.design'].json_technology_design_str(k, route, i, False)
-                            )
+                    if production.product_id.model_processing_panel:
+                        for k in (production.product_id.model_processing_panel.split(',')):
+                            for route in product_routing_workcenter:
+                                i += 1
+                                technology_design_values.append(
+                                    self.env['sf.technology.design'].json_technology_design_str(k, route, i, False)
+                                )
                 elif production.production_type == '人工线下加工':
                     for route in product_routing_workcenter:
                         i += 1