The imaging simulation for the infrared detection process of the aircraft contributes to the evaluation of the infrared stealth performance, thereby improving the anti-reconnaissance ability to deal with infrared detection. The aircraft infrared imaging simulation model was established, and the skin temperature and infrared radiation brightness for different flight attitudes, speeds and detection moments were solved. The results show that when the aircraft runs from low speed to high speed, the solar radiation conditions and the temperature distribution of the aerodynamic heating layer become the main factors affecting the imaging results. The modeling method and simulation results proposed have guiding significance for the stealth design of the aircraft, and provide a theoretical basis for the generation of real-time infrared imaging scenes.