In the presence of the angle tracking deception difficulty of monopulse radar, a self-defense coherent deception jamming model of dual stealth aircraft based on long-range support assisted multi-false-target jamming is proposed under the background of the self-defense coherent jamming of dual stealth aircraft against monopulse radar in complex electromagnetic environment. Firstly, the attitude sensitivity model of dual stealth aircraft is constructed, and the real-time radar cross section (RCS) sequence is extracted. According to the corresponding relationship between target echo signals and jamming signals, the basic composite equivalent signal to interference ratio model is established. Furthermore, the judgment criterion is constructed by using missdistance and minimum instantaneous distance of effective jamming to form evaluation indexes for dual aircraft networking countermeasures modes. The simulation results show that the netted jamming mode can increase the angle tracking error of radar by 696.49 times, and the average angle tracking error of monopulse radar by 1.07 times compared with the single jamming mode, and the validity of the combined coherent interference mode is verified.