Aiming at the problem of operational effectiveness evaluation of buried air-to-air missiles, a more perfect two-step ruling method is proposed by integrating the formation mode, situation information and target allocation model into the traditional multi-step ruling method. By analyzing the actual situation of the battlefield, the advantage function is established from the angle of azimuth and the entry angle respectively, and the series system is introduced to construct the carrier angle advantage function. According to the influence of the combat altitude on the far-end of the missile attack area, the air-to-air missile advantage function is constructed. Combined with the high-potential function, the above three dominant functions are aggregated into the air-war advantage function, and the first enemy launch probability model, missile damage probability and the integrated threat index model are established accordingly, then the target allocation is completed. The simulation results show that the evaluation results of the improved algorithm are in good agreement with the objective situation, which can provide theoretical reference for studying the operational effectiveness of the buried air-to-air missile.