Power supply monitoring equipment

The utility model belongs to the technical field of power supply monitoring, and particularly relates to a power supply monitoring device, which comprises a hollow outer cover body, the middle upper side of the left side wall of the outer cover body is in an opening shape, and a through groove is formed at the opening; the power supply battery, the control circuit structure, the detection end and the alarm are located in the outer cover body, the control circuit structure is fixedly installed on the inner wall of the outer cover body, the power supply battery is located on the lower side of an inner cavity of the outer cover body, and the alarm is arranged on the upper right side of the inner wall of the outer cover body. The right upper side wall of the outer cover body is provided with a sound playing hole corresponding to the position of the alarm, and the control circuit structure is electrically connected with the power supply battery, the detection end and the alarm. The working condition of the power s