Abstract: Surface discharge is an important form of high voltage insulation breakdown in power system. It is difficult to build a high-voltage environment for physical equipment due to the high risk, high cost of experimental equipment and high technical requirements of laboratory construction. By building an experimental teaching platform of surface discharge under high voltage based on virtual simulation technology, the experimental scene consistent with the actual site was realized. The phenomenon of surface discharge under high voltage with uniform and non-uniform electric field was truly reproduced, and the whole process of surface discharge under high voltage was restored. The platform forms closed-loop ability cultivation from principle cognition, foundation verification to design innovation, enabling students to analyze and study factors affecting surface discharge and methods to improve surface discharge voltage, improving students' engineering practice and application innovation.