For improving the capability and battle effectiveness of tank fire control system (FCS), a suit of tank fire control system fit for high-speed state is designed. The development of tank fire control system is briefly introduced. The reasons of affecting the performance of tank fire control system, such as hit solving theory of FCS, target tracking and state identification, stabilizing accuracy of gun control system, and firing delay error etc, are analyzed, and put forward corresponding improving means. This study can be the reference for the development of future tank.