The utility model discloses an angular difference standard device of an electronic transformer. The device comprises an optical fiber network port, an Ethernet PHY chip, a synchronization module, a DAmodule, a field programmable gate array FPGA, a microcontroller MCU and a man-machine interaction module. The field programmable gate array FPGA is used for communicating with the man-machine interaction module; receiving an instruction sent by the human-computer interaction module, and according to the instruction, controlling a synchronization module to output a synchronization signal, controlling a PHY chip to output a digital message based on an IEC61850 protocol, configuring a microcontroller MCU to generate waveform data, receiving the waveform data generated by the microcontroller MCU,outputting the waveform data to a DA module, and generating a corresponding analog waveform. According to the utility model, the delay time of the analog circuit part is determined by recording the time difference between the square wave signal and the synchronization signal through the high-frequency clock, and the delay time is converted into the angular difference through data processing, thereby realizing accurate and stable transmission of the angular difference.