Abstract: A distributed co-interactive genetic algorithm is proposed in this paper to overcome the disadvantages of interactive genetic algorithms implemented in the single PC environment,and the key technologies to implement the algorithm are given.Based on the satisfaction degree of group decision and the users' preference,methods are pre-sented to determine the number and selection method of sharing individuals.An appropriate evaluating platform,the effective decision-making evaluation indices and the implicit way to interactive information are also presented.Based on individual similarities,an approximation strategy of similar fitness is put forward to reduce user fatigue.At last,considering the color design of dress,the experiment results are given to validate the feasibility of the proposed algorithm.