The factors of outline appearance, colors and interior decorations in vehicle design have direct influence on consumers. How to express these factors rapidly and vividly by using virtual reality (VR) technology has been researched in the paper. Firstly, the design scheme has been presented out of virtual driving platform. Secondly, the vehicle models and its exterior scenes have been built. In addition, the virtual driving platform has been established based on EON Studio, the Cg advanced rendering and the collision detection are developed of vehicle body and exterior scenes. Finally, the human-machine interactive operations have been realized, which provides virtual environment for designers and customers to observe and experience freely in the virtual driving platform.