In this paper, the control system of flap hardware simulator is carried out based on the request of flight control system. The interfaces and functions of this system are the same with the real flap flight control system.Hardware simulation methods based on digital simulation module expansion analog circuit connection are adopted to investigate the hardware simulation module of the flap flight control system which have the same function and connections with the real flap system. The related experiments could be done by using the flight control system of flap hardware simulator instead of the real flap system. The results show that the system could provide security for flap flight control system.