The invention relates to a multifunctional wireless relay protection debugging auxiliary instrument. The instrument is characterized in that a shell is provided with an LED liquid crystal display screen, a function knob, a positive electrode input terminal, a negative electrode input terminal, a talkback power switch, a wireless data communication antenna, a pulse positive electrode output terminal, a pulse negative electrode output terminal, a pulse output control button, an audio output port, a Bluetooth connection port and a charging interface; and a debugging circuit is arranged in the shell and comprises a voltage measurement module, a resistance measurement module, a power supply module, a voice module, a wireless communication module, a microprocessor and a battery electric quantitydetection module. The instrument is scientific and reasonable in design, is small in size, is complete in function, can realizes functions of a simple universal meter, full duplex intercom, PT phasechecking, polarity discrimination of a power transformer polarity test and wireless control of pulse output, and is flexible in use; and debugging is flexible, and the working efficiency is improved.