As for the selection of SDN enterprise cooperation partner, this paper firstly gives the corresponding weight to each indicator factor by experts, then uses analytic hierarchy process (AHP) to derive indicators' weight at every level by determining matrix, finally uses appropriate subjective weight coefficient to average the two weights to derive the ultimate weight of each index, then uses fuzzy comprehensive evaluation method to determine the evaluation index of each case, uses comprehensive ranking to derive judging results and finally uses examples to verify the practicability of this method.