With the development of the aircraft technique, the target characteristics have low elevation， near distance monitor， low ＜i＞S/ N＜/i＞， fast speed and subsonic flying. When radar is working, as we all known, it is difficult to search and track a hedge-hoppling weapon quickly and precisely for its multi-path domino-effect. In order to efficiency settle the problem, the radar low-angle tracking technique is discussed in this paper.