The key technology of VR virtual reality is dynamic environment modeling technology, and the establishment of virtual environment is the core content of virtual reality technology. The purpose of dynamic environment modeling technology is to obtain three-dimensional data of the actual environment, and according to the needs of application, use the obtained three-dimensional data to establish the corresponding virtual environment model. Three-dimensional data can be obtained by using CAD technology (regular environment), and more environments need non-contact visual modeling technology. The organic combination of the two can effectively improve the efficiency of data acquisition. Real-time three-dimensional graphics generation technology, three-dimensional graphics generation technology has been relatively mature, the key is how to achieve "real-time" generation. In order to achieve the real-time purpose, at least the refresh rate of graphics should be guaranteed not to be lower than 15 frames/second, and preferably higher than 30 frames/second. On the premise of not reducing the quality and complexity of graphics, how to improve the refresh frequency will be the research content of this technology.