Abstract: On behalf of the latest design concept and the new design level, the virtual prototype technology meets the rapid development of the advanced military equipment. This technology can effectively improve the development efficiency and quality, shorten the research cycle and reduce the cost. The application of virtual prototype technology to radar design and maintenance is illustrated in detail based on the actual products. With this technology the risk of radar design can be effectively reduced and the maintainability and product quality can be improved. The application of virtual prototype technology to the radar provides technical support for application and development in electro-mechanical field.