In the process of Purchasing, selectingsuppliers is an important mean and precondition for obtaining high-quality products. In this paper, we analyze some factors affecting supplier selection, such as product quantity, production price, product quality and product delivery time, formulate a supplier selection model based on linear weighted multi-objective integer programming, the objective function and constraints of the model are made and carried out, alongside a case study. The conclusions of the study can provide theoretical and methodological support for the practical work of selecting suppliers.