Aiming at the TG-02 accompanying satellite′s observation mission, the imaging simulation method of visible camera based on OpenGL was introduced. Based on the ephemeris and attitude data of the complex and the accompanying satellite, and 3 ds format of the complex 3D model, the parameters of OpenGL perspective projection model were set properly. Combined with the complex surface material properties and the visible camera imaging performance model, the complex′s visible image sequences were simulated. By being compared with actual observation images, the simulation method was proved to be effective and credible. This research can provide references for design and system simulation of space-based optical imaging payload, as well as the flight control task arrangement.