Abstract: The supersonic anti-ship missile infrared radiation characteristic research has the important reference value to naval battle offense and defense both sides. Provided an in-depth analysis of the infrared radiation characteristics in sea battlefield environment, introduced cumulative factor, the environment radiation computation model was established in view of the multiple scattering effects of particle, Focus on cloud radiation calculations, the model feasibility had been confirmed by simulation. Established the computation model of the IR radiation characteristics and radiating area of missile skin and plume, carried on the simulation computation to the missile infrared radiation brightness and the radiation intensity. Finally, by comparison and analysis of the simulation results, the result indicates that this algorithm can be applied in the radiation calculation of particle system effectively, can be used for generation infrared image sequences.