In order to improve the interpretability of the index weights in the evaluation of weapons programs, an evaluation method based on the combination weights with maximum variance was proposed.This method firstly calculates the subjective and objective weights of each index, and then evaluates the scheme with the objective of maximizing the variance of the evaluation results and the constraint of the index weights between the subjective and objective weights.The combined weights not only take into account the importance of the indicators themselves, but also take into account the differences between the indicators. The feasibility of this method is verified by the application of six kinds of rifles.