In order to study the operational effectiveness of aircraft terminal infrared countermeasure, the infrared countermeasure simulation system is established to model and simulate the aircraft infrared characteristics, decoy jamming characteristics and laser directional jamming characteristics respectively. The infrared countermeasure scene is established by the method of real-time calculation of infrared characteristics to combine the aircraft terminal defense of different operational environments and jamming scenes. Infrared image rendering and model solving are carried out to provide real-time infrared countermeasure scene for infrared jamming effectiveness evaluation. Combined with the typical combat situation and aircraft maneuver mode, the dynamic infrared scene of target and decoy in the seeker field of view is simulated and analyzed, and the jamming effectiveness evaluation and jamming use strategy research of different jamming means for aircraft terminal defense can be carried out. The simulation results show that the aircraft infrared countermeasure simulation system can effectively study the operational effectiveness and jamming strategy formulate of the terminal infrared countermeasure.