Abstract: The radio wave rainfall attenuation model was used to analyze the influence of rain attenuation on Ka band satellite communication links.It shows that the uplink should be in horizontal polarization and the downlink in vertical polarization.By this way,it can reduce the influence of rain attenuation at most and interferences between uplink and downlink will be the least.It was presented that the real-time dynamic rain attenuation compensation should be employed on the uplink and the fixed rain attenuation compensation on the uplink.This can simplify the satellite control.By using rain attenuation information of the downlink,setting compensation limit and injecting signal compensation flow,the wrong compensation induced by factors other than rainfall can be sovled and a high compensation precision can be got.