Abstract: The sidelobe cancellation(SLC ) technology is an important measure of radar anti-active pressure noise jamming, which can effectively improve the maximum detection distance of radar. In this paper, start with the introduction of the working principle of SLC, analyses the main technologies from three aspects: the design of auxiliary antenna, the selection of cancellation sample and the consistency of main-auxiliary channel. Combined with the common problems of anti-jamming experiment,the solutions such as time sequence alignment and full range noise segmentation sampling are given,and the limitations of existing sidelobe cancellation performance indicators are analyzed. At last, the paper proposes new sidelobe cancellation performance indicators, and the rationality of the indexes are verified.