With the wide application of space technology, society's dependence on space-based technology is increasing, and future space confrontation is inevitable. In order to adapt to this situation, an innovative space-based kinetic energy weapon - space-based modular intelligent missile is proposed. The missile, which can be launched from a space-based platform, has faster response speed, greater flexibility and a wider range of applications than land-based and sea-based launches, and can be used in different scenarios, including ground attack and satellite interception. The space-based missile does not need a conventional missile head, relying on its own weight and kinetic energy to destroy the target. This paper firstly introduces the composition, principle and strike mode of the space-based kinetic energy weapon; secondly, the key technologies needed for the space-based missile are analyzed according to the operational requirements; thirdly, the application status and research progress of each key technology in space-based weapons are summarized and analyzed by means of investigation and comparative analysis; fourthly, the applicability of each technology in space-based missile is preliminarily discussed, which lays a technical foundation for the follow-up research of space-based modular intelligent missile; finally, based on these foundations, the future development of space-based modular intelligent missile is prospected.