In order to solve the problem that the weight of the index is too large when the traditional entropy method is used to evaluate the evaluation index, and the entropy method is improved by introducing the analytic hierarchy process (AHP). Solve the index weighting by comparing the index difference coefficient, point out the shortcoming of traditional entropy method, and establish judgment matrix based on information entropy and resolve index weighting. Separately carry out fight efficiency evaluation for 7 index weighting by using the traditional entropy method and introducing AHP entropy weighting method. The results show that the method can compensate the deficiency of the single index weight may big in the traditional entropy method weighting, and the weighting result is more reasonable, and combat helicopter combat capability evaluation is more accurate with the variation of the index.