This paper puts forward a new method of evaluating the multi-type missiles network fighting deployment effectiveness. First, an evaluation index system is established, then D - S evidential combination algorithm is applied to dealing with the evaluating data from many experts. Based on the achieved decision - making matrix, entropy technique is applied to modifying right index given beforehand, and then combined with decision - making matrix the evaluation result is obtained. Finally an example is given to prove the usability of the model.