At the national level, the Electromagnetic Pulse Committee has been established and the strong electromagnetic pulse defense plan has been actively promoted. China Southern Power Grid attaches great importance to the risk of power grid equipments being attacked by strong electromagnetic pulse. In order to strengthen the security defense of power grid and improve the reliability of power supply, it is urgent to establish strong electromagnetic pulse test platform to carry out relevant experimental research. Firstly, the functional positioning and general layout of the strong electromagnetic pulse test platform have been studied. Then, research and construction have been carried out from field power consumption and test power supply, electromagnetic shielding chamber and control room, substation equipment and transmission line, ground network design, fire protection and water supply. Finally, field debugging and electromagnetic environment testing are carried out. The strong electromagnetic pulse platform for power grid equipment is established for the first time in China, fully meeting the needs of various tests of strong electromagnetic pulse and providing platform support for research on the generation and propagation characteristics of strong electromagnetic pulse, the influence law on power grid main equipment and control & protection equipment, and the research and development of defense devices.