Nowadays the resource organization process has forced the investors to consider the candidate enterprises very carefully. To avoid the effect of the mutual relationships between the similar enterprises, it is helpful to evaluate the candidate enterprise comprehensively and objectively. An extension evaluation method for the candidate enterprise is presented on the analysis of the third party logistics enterprises. Firstly the measuring weights are determined using the AHP method; secondly, the dependent function is established, and calculates the qualification degree of each enterprise using this formula, also we should normalize it. Thirdly the optimal degree is calculated to evaluate the enterprise. The enterprise with the highest optimal degree is the most important enterprises for enterprise.