Because of the pressure of foodstuff security in recent 10 years, guarantee food safety has become an important strategic decision so that supplier selection is a prime concern. In this article, through analyzing the factors when evaluating and choosing strategic cooperation supplier which has important effect on agri-food retailers, the hierarchy model of the agri-food supplier has been constructed. Based on the AHP, the mathematics evaluation model of the agri-food supplier has been established. Take some simulative agri-food suppliers as example, according to the hierarchy model and the mat...