With the wide application of various new radar system technologies in the military, the future battlefield electromagnetic environment is more complex and difficult to predict. The survival environment of aircraft platform is relatively bad. Therefore, in order to cope with the threats of air defense radar, guidance radar and terminal guidance radar seeker, and effectively enhance the self-defense and penetration attack ability of aircraft platform, active decoy is paid more and more attention by all parties. The development status of various types of active radar decoys in foreign countries is introduced. The main operational strategies of active radar decoys are analyzed. And the future development trend of active radar decoys is forecasted.