Abstract: Aiming at the problems of large drop, long line and difficult construction organization of high-voltage cable shaft, combined with the experience of on-site construction and design over the years, a construction method was put forward to solve the laying of high voltage cable in the environment of high drop shaft, and relevant auxiliary equipment was developed with this method. It has been successfully applied to the laying construction in the high voltage cable shaft of a pumped storage power station, which overcomed the adverse factors such as long cable line, large laying drop, tight construction period and great construction difficulty. During the laying process, the startup rate of transmission equipment reached 95%, which greatly reduced the time of equipment shutdown and adjustment, and the number of personnel was reduced by about 1/3 compared with the traditional mode, which greatly improved the construction quality and efficiency.