The utility model discloses an auxiliary electronic metronome for cardiopulmonary resuscitation. The auxiliary electronic metronome comprises a single-chip microcomputer, a nixie tube, a decoder, a latch, a buzzer, an LED lamp, a control keyboard and a power source. The buzzer control signal output end of the single-chip microcomputer is connected with the control end of the buzzer, the LED lamp flicker signal output end of the single-chip microcomputer is connected with the control end of the LED lamp, the control end of the single-chip microcomputer is connected with the control keyboard, the decoder control signal output end of the single-chip microcomputer is connected with the control end of the decoder, the latch control signal output end of the single-chip microcomputer is connected with the control end of the latch, the signal output end of the decoder is connected with the bit selection signal input end of the nixie tube, the signal output end of the latch is connected with the segment selection signal input end of the nixie tube, and the power source supplies power to the single-chip microcomputer. External chest compression basis reference frequency can be provided for rescue workers through meter sound of the buzzer and flickers of the LED lamp, and the rescue efficiency and quality of cardiopulmonary resuscitation are effectively improved.