A new guidance superiority model is proposed to solve the problem of selecting the fighter to guide missiles when the guidance power of missile is transferred in multi-fighter cooperative air combat. Firstly, the influence factors of guidance superiority under air-to-air condition are analyzed, including the detection capability of airborne pulse-Doppler radar for target, radar guidance link capability and missile pass back link capability. Secondly, the radar detection superiority model is presented using detection probability according to the radar-cross-section and ground clutter of targets in different situations. Thirdly, the guidance link dominance model and the pass back link dominance model under different situations are established based on the receiving power of guidance link and pass back link. Finally, the advantages of the three mentioned above are aggregated into the guidance superiority model. Simulation results show that the model is reasonable and effective.