Aiming at solving the problem of target information break in the process of handing over the guidance of Mid-Long range air-to-air missile between the same kinds of aircrafts in cooperative air combat, a method of “virtual target” was proposed: the virtual target approached the real target gradually, when the aspect angle of missile-virtual target and the missile-real target matched, and the process of handing over the guidance was over. Three different modes of approaching movement was proposed, and the affection on the over loading of air-to-air missile was analyzed through simulation of the situation of the target in the process of maneuvering and not maneuvering. The simulation results showed that handing over the guidance appropriately and moderately can transform the break information which is unmanageable into the break information which is manageable, and can avoid the information breaking into improper value if the guidance is handed over roughly.