This study analyses the strengths and existing problems in several main models of supply chain for vegetables according to the surveys in Shanghai. Staring from the collaborative pricing strategy which is the main parts in the supply chain integration, this paper builds a mathematics model based on the theory of Bilevel Programming , in order to achieve steady growth in overall income and each members’ profits in vegetable supply chain. Meanwhile, this paper describes a ideal vegetable supply chain which could guarantee the profits of farmers and citizens.