Abstract: The absence of supplies' interest is existed in recommendation algorithm, to address the issue in this paper Pareto Optimality is introduced and a modified two-sided algorithm is proposed.Firstly, it compares consumers' demand and suppliers' properties, then infers the consumers' satisfaction.Secondly, it compares suppliers' demand and consumers' credit, then make sure the supplies' satisfaction.The improved the G-S algorithm for consumers and sellers provides appropriate match according the consumers' satisfy.Experiments show that the algorithm has high satisfy.