The invention relates to a test comparison method and device for an electronic voltage transformer under VFTO conditions and belongs to the detection technology field of an electronic transformer. According to the method, a standard capacitive divider and a high precision oscilloscope are employed to record primary voltage waveform during action of the high voltage switch, analysis comparison with a voltage of a to-be-tested electronic voltage transformer is carried out, and transmission reliability of the electronic voltage transformer for a primary transient voltage is verified. The method is advantaged in that influence of primary transient overvoltage caused by operation of the high voltage switch exerted on output of the electronic voltage transformer is analyzed, detection accuracy and reliability of the primary voltage of an intelligent transformer station during operation of the high voltage switch are effectively improved, and large-area popularization and application of the electronic transformer in the intelligent transformer station is facilitated.