The utility model discloses a survey device of the electronic voltage transformer harmonic degree of accuracy, include: source of harmonic voltage, capacitive voltage divider, voltage follower, a data acquisition unit, the 2nd data acquisition unit, merging cells, network card, synchronized clock and data processing unit, capacitive voltage divider's high -pressure side is parallelly connected with the electronic voltage transformer's that awaits measuring once side, fourier gathers the output signal of the two after calculating the sum of errors angular difference. The utility model discloses can realize electronic voltage transformer's the whole check -up of the harmonic degree of accuracy, satisfy the electronic transformer type test demand, detect out electronic voltage transformer's harmonic measurement ability authentic and validly.