<正>Short supply and requiring supplement immediately are considered in supply chain model of based on definite demand, and ready source of initial stock, but the velocity of supplement inventory isn’t considered. A new supply chain profit model of is established, and the postponement supplement is considered too, which is closer to the actual case. Firstly, the traditional supply chain profit model is discussed. Secondly, the new supply chain profit model of is established and optimized based on the improved traditional model to gain the best supply chain profit. Finally, the new model is validated by numeral simulation, and the result indicates that the new model is correct.