Aiming at the problems existing in the comprehensive evaluation of the operational capability of the missile weapon equipment, the evaluation method based on the performance requirements is puts forward. This method is based on the mission of missile weapon, using DoDAF to establish missile target-operational activity-sub ability-capacity performance decomposition process in order to get the underlying demand performance index system, and the four requirements satisfaction function of four performance is defined according to the type of performance requirements, the satisfaction function of top level capacity requirements polymerization from bottom to top is take as results of missile weapon combat capability evaluation, finally an example is given to illustrate the feasibility of the evaluation method. The analysis results show that the method is feasible and can reflect the size of missile weapon combat capability.