Abstract: Enterprise partner selection and optimization are a key problem in the process of business operations.Aiming at the problems of enterprise partner selection,the multi-objective decision model for enterprise partner selection for Supply and Demand Network(SDN) was presented.By using the ideal point method in the model,partner selection problem for SDN is accurately and comprehensively decrypted,and particle swarm optimization algorithm was presented for optimizing the decision model.Finally,examples and simulation results show that the decision model is practical and the algorithm is valid.