The principles of intermittent sampling forwarding jamming and intermittent repeated forwarding jamming were expounded.Based on chirp pulse compression radar,the intermittent repetitive forwarding jamming was simu-lated;the influence of sampling repetition period and pulse duty ratio on the interference effect on repeated forward-ing jamming was studied.The relationship among pulse sampling repetition period,duty ratio,jamming-signal ratio,constant false alarm detection protection unit and reference unit length were analyzed and verified.