In order to decrease the uncertainty on the efficiency evaluation of early warning satellite detection, and compensate for the deficiencies of traditional methods such as FAHP (fuzzy analytic hierarchy process) when dealing with uncertain problem, this paper proposed an evaluation method based on D-S evidence theory. This method regards evaluation indexes and evaluation information as focal elements and evidence source in D-S evidence theory, and then use Dempster fusion rule to fuse evaluation information. It can be concluded in the result that compared with conventional FAHP, the method in this paper has stronger ability to deal with the uncertain information, which can improve the evaluation accuracy.