总结国内外汽车防撞雷达技术领域的发展情况，介绍了汽车防撞雷达技术的发展现状及雷达技术在汽车防撞上的应用，以及汽车防撞雷达系统、调制方式及其基本原理，最后对汽车防撞雷达技术的发展作出了展望.-Summary of developments at home and abroad in the field of automotive collision avoidance radar technology, introduces the automotive collision avoidance radar technology development status and radar technology in the car crash, and automotive collision avoidance radar systems, the modulation scheme and its basic principles, the last of development of automotive collision avoidance radar technology has made prospects.