In order to solve the quantitative evaluation problem of the performance of antiaircraft gun weapon system, the performance evaluation model of antiaircraft gun weapon system is constructed based on the attribute hierarchical model (AHM). Based on the model, a quantitative evaluation method for the performance of antiaircraft gun weapon system is given, and the evaluation method is optimized under the weighted condition, which improves the accuracy of the performance evaluation. The results show that this method can quantify the performance evaluation problem concretely and has higher accuracy, which provides a reference method for the quantitative evaluation of other weapon equipment performance.