The invention discloses an electronic transformer angular difference standard device. At present, a device capable of accurately and stably transmitting an electronic transformer angular difference isunavailable. The device comprises a fiber optic network port, an Ethernet PHY chip, a synchronization module, a DA module, a field programmable logic gate array FPGA, a micro controller unit MCU, anda man-machine interaction module, wherein the field programmable logic gate array FPGA is used for being communicated with the man-machine interaction module, receiving an instruction transmitted bythe man-machine interaction module, controlling the synchronization module to output a synchronization signal and the PHY chip to output a digital message based on the IEC61850 protocol according to the instruction, configuring the micro controller unit MCU to generate waveform data, receiving and outputting the waveform data generated by the micro controller unit MCU to the DA module and generating a corresponding analog waveform. The device determines delay time of an analog circuit part by recording a time difference between a square signal and the synchronization signal through a high-frequency clock, converts the delay time into the angular difference by data processing and therefore achieves accurate and stable transmission of the angular difference.