This paper discussed the current state of radar jamming simulation,and according to the principle of jamming signal the simulation of radar jamming was classified as four types.Based on the classification the clutter jamming,blanking jamming and deception jamming were modeled respectively.Then three types of radar jamming were simulated with VC++6.0 and the results were compared with actual jamming images to validate the rationality of the simulation.In conclusion the simulation software of air defense radar jamming provided a platform for radar jamming training and would promote electronic warfare ability of air defense forces.