Absorptive chaff is a kind of light and highefficiency passive jamming material. Through making echo amplitude scattered heavily in the air received by enemy equipment in detecting fallen, this can reduce the probability of being found and tracked by radar equipment. This paper studies the jamming performance of absorptive chaff cloud on radar wave. First, combined the existing research results, the jamming mechanism of absorptive chaff cloud on radar wave is analyzed. Then, according to the transmissionline theory and energy conservation principles, models of reflection loss and transmission loss on the surface of absorber are built. Finally, a power attenuation model is built, and radar maximum range changes after interference is obtained. The simulation results show that the absorptive chaff cloud has obvious weak effect on radar wave. With 100 meters’ thickness, the attenuation can reach 23.4 dB. When attenuation is greater than 8.7 dB, the bandwidth can be 11 GHz, which is 64.7 percent of the entire bandwidth. Therefore, absorptive chaff cloud has obvious weaken effect on radar wave, and this has some value of application in the battleground.