Abstract: Due to the DC current has no natural zero crossing point and high short-circuit current rise rate, DC current rapid interruption and system fault removal has become a major bottleneck restricting the development of DC power system. This paper firstly introduces the technical requirements and difficulties of DC fast interruption. Secondly, we analyze in detail the key technologies involved in DC fast interruption process, including current commutation technology, solid-state DC interruption technology, dielectric recovery technology, and high-speed mechanical switch technology, etc. Moreover, we review the current development status of various technologies and their applications, and compare the characteristics and adaptability of different technical solutions. Finally, the future development direction of DC fast interruption technology is discussed and summarized, which provides new technical ideas for the research and development and popularization and application of miniaturized, high-performance, low-cost, and highly-reliable fast DC circuit breakers.