As an important part of the distribution system, how to select a logistics distribution center is of great importance in research. This paper combines DEA with gray correlation analysis, and applies grey relational constraint cone DEA model to site selection, which builds an index system of cost-efficiency for evaluation of economic reasoning. This method has overcome the subjectivity in determining the weights, and achieved the optimality of priority assessment through "non-uniform", thus it represents the impartiality of investment analysis. The paper also illustrates the effectiveness of the methods.