Aimed at both sides’ maneuver decision problems in air combat that changes of angle, distance, velocity and altitude dominant function are considered to make maximum air combat superiority expectation as target, the Monte Carlo tree search method is introduced. The search strategy is used by the mini-max search algorithm. Against the confrontation between the two aircraft, the simulation results of air combat situation and advantage change curves show that our fighter is in the dominant position for the most part in the whole process in air combat by using MCTS method. At the same time, the realtime performance of the algorithm is simulated. The results show that the model time of the algorithm computing maneuver action is located at 50～100 ms range to meet the needs of real-time.