Abstract:As the electromagnetic radiation between infrared and millimeter waves，Terahertz wave is in the transition area from electronics to optical，which bears the characteristics of both the penetrability of microwave and high resolution of infrared imaging. Therefore, it is suitable to enormous potential applications in military fields including radar, broadband communication，security detection and remote reconnaissance. The characteristics of THz imaging radar technology are introduced in this paper. Combined with the application requirements of the missile guidance and the technical development status，the feasibility of THz imaging radar technology used in guidance is analyzed. The related problems are discussed as well.