The invention discloses an electronic transformer harmonic calibrator calibration device and method. The calibration device comprises a harmonic generator, a synchronous trigger module, a frequency division module and a standard digital signal generating device. The harmonic generator and the standard digital signal generating device generate standard analog harmonic signals and standard digital harmonic signals respectively, and the signals are sent to a tested electronic transformer harmonic calibrator. A difference value which can be set is formed between an effective value and a phase of the standard analog harmonic signals and the standard digital harmonic signals, and the difference value is a standard value. A testing result of the tested electronic transformer harmonic calibrator is compared with the standard value, and testing errors of the tested electronic transformer harmonic calibrator can be obtained. The harmonic generator meets the national harmonic standard, the standard digital signal generating device is completely generated through mathematical formula operation, and theoretically, errors do not exist.