On the background of UAVs’ air combat in the condition of the beyond visual range(BVR), the cooperative combat simulation model which integrates situation assessment, target allocation, and loss adjudication is established. Firstly, the situation assessment method based on the artificial potential field is proposed on the analysis of friendly aircrafts’ locations and enemy combat power. Then, the memetic algorithm is applied with the purpose of solving the target allocation problem. In this algorithm, the discrete differential evolution algorithm is used to global search and the neighbor search algorithm is used to local search. Finally, to simulate the both sides’ exchanging attacks and adjudge their losses, the two step adjudication is introduced to this air combat model. The simulation result shows the effectiveness and feasibility of the proposed model.