In order to improve the support capability of combat support unit in the process of missile delivery, a capability evaluation method was proposed. By analyzing the accompanying support requirements in the process of missile delivery mission, the evaluation model of accompanying support capability is established, and the fuzzy analytic hierarchy process (F-AHP) is used to evaluate a combat support unit. The results show that the method can meet the needs of actual combat, reduce the influence of subjective factors, and play a guiding role in the decision-making of military accompanying support.