Two kinds of Petri-net models for supply chains business process are set up based on Made-TO-Stock(MTS) and Made-TO-Order(MTO).The inventory, order response time and utilization ratio of equipment are analyzed and compared by simulation.Results show that the supply chain based on MTO is much better than one based on MTS in inventory,and supply chain of MTS is a little better than one of MTO in the order response time and utilization ratio of equipment.It is obvious that the synthetical performance of supply chain based on single production model isn't perfect.