The utility model relates to a voltmeter and a meter pen special for a protection pressure plate, which belongs to the technical field of power detection equipment. According to the technical scheme of the utility model, a data collection module (12), an analog-to-digital conversion module (13), a controller (14), a function self-inspection module (15), a data display module (16) and a voice broadcasting module (17) are arranged inside the voltmeter (1). A voltmeter display screen (2), a loudspeaker (3), a self-inspection button (4), a power switch (5), a meter pen cathode jack (6) and a meter pen anode jack (7) are arranged on the outer surface of the voltmeter. The defects in the prior art, such as wrong selection of gears, uneasy fixation of grounding points, uneasy observation of readings, incapability of function inspection and the like, which occur during the measurement process of a voltage applied across the two ends of a pressure plate by means of existing universal meters, can be overcome. Meanwhile, the occurrence of mistrip and other similar conditions is reduced. Moreover, the self-inspection function and the voice broadcasting function of the voltmeter are additionally realized. Through improving the structure of the meter pen of the voltmeter, the number of measurement personnel is reduced.