According to the practical needs to carry out the UAV combat simulation, this paper discusses the UAV combat simulation platform design and its key technology. Introduce UAV combat simulation, and principle of UAV combat simulation platform design. Carry out primary design for UAV combat simulation platform from main function, composition, software technology architecture and use procedure, and so on, and the key technologies are researched in detail. The research provides the basis and guide for development the UAV combat simulation platform.