Compared with traditional infrared decoy, surface source infrared decoy has obvious superiority in burning rate, diffusion range, jamming effectiveness and so on. Considering the economy of cost and improvement of jamming effectiveness testing efficiency, a thought which can simulate the testing work was proposed based on air confrontation. Firstly, the models of missile movement, seeker tracking and aircraft infrared radiation were established, which were regarded as hypothesis of air confrontation both sides. Secondly, the motion and burning model of decoy foil was built. The decoy foil was taken as the researching object and solving foil surface temperature distribution. By optimizing combustion algorithm, the overall radiation characteristic was obtained. Finally, through changing factors, such as the launch angle, height of decoy and the speed of aircraft, jamming effectiveness was tested. It′s resulted from simulation that the effectiveness evaluation thought close to the real scene is feasible and effective, meeting the demand of evaluation.