To make the visual simulation achieve the dual demands of real-time and realistic, This article describes a fusion technology that a simulation model and a true background based on real-time video. Use the video application software toolkit VFW (Video for Windows) capture real-time video to form the real texture. Real texture replaces the traditional three-dimensional background modeling in OpenGL simulation system, we established a simulation scene which aircraft at high altitude overlooking the ground with level change. Experiments prove that this approach not only simplifies the visual simulation steps, save time-to-background modeling, but also increases the fidelity and easy to achieve fast simulation of the scene.