Radar and communication are the "clairwise eyes" and "wind ears" on the battlefield, which play a very important role in modern information war. Anti-radiation unmanned aerial vehicle(UAV)is a weapon system that can suppress and destroy radar and communication targets for a long time, and is an indispensable electronic warfare "hard kill In this paper, the general situation, key technology and development prospect of anti-radiation UAV are discussed. Firstly, the definition, characteristics and advantages of anti-radiation UAV are given, and the differences between anti-radiation UAV and anti-radiation missile in design concept, operational use and tactical purpose are analyzed. Then the development of anti-radiation UAV and its development in the world"s major military powers are introduced. The main key technologies to be solved in the development of anti-radiation UAV equipment are analyzed and summarized. Finally, the future development trend of anti-radiation UAV is prospected. With the development and application of autonomous technology, intelligent technology and swarm technology, the new generation of anti-radiation UAV will be a new combat equipment with new quality combat effectiveness on the battlefield.