According to the principle of the hardware-in-the-loop simulation system based on the real-time network, the platform of the simulation system is constructed. The working process of the hardware-in-the-loop simulation system based on the real-time network is described, the function and control method of the every module of the system are introduced, and the superiority of the method based on the read-time network is also analyzed. The source code under the windows platform is given.