Abstract: The new energy vehicle safety inspection system has added charging safety inspection equipment, chassis dynamometer, and electrical safety inspection equipment compared to the traditional fuel vehicle safety inspection system. This article studies the calibration methods for the main parameters of the charging safety inspection equipment, including output power, chassis dynamometer torque, vehicle speed, drum synchronization and maximum absorption power, as well as the charging socket insulation resistance, potential balance measurement error, and potential balance test current setting error of the electrical safety inspection equipment. By using these calibration methods, we ensure the accurate transmission of detection equipment values, provide technical support for the safety performance testing of new energy vehicles, ensure the safe operation of vehicles, and provide reference for the development of relevant calibration specifications in the future.