With the development of decoy simulation and deception jamming, the true-false recognitionof ballistic targets has become the core technical problem for ballistic target defense systems. This paper analyzed the system configuration and key technologies of next-generation ballistic target defense radar. Next, the state-of-the-art technologies of ballistic target feature extraction were summarized from the two aspects of monostatic radar and bistatic radar.Finally,the future development of ballistic target feature extraction was prospected.