The utility model provides a high-voltage electroscope, which mainly comprises a high-voltage detector, a telescopic type insulation rod and a retaining ring. The high-voltage detector is internally provided with a test circuit, an electroscope input circuit, a start-up circuit and a voice indication module. The lower part of the high-voltage detector is embedded with an infrared emitter. The test circuit and the electroscope input circuit are connected with the input end of the start-up circuit. The voice indication module and the infrared emitter are connected with the output end of the start-up circuit. The retaining ring is fixedly arranged above a handle. The distance between the luminous point of the infrared emitter and the center of the telescopic type insulation rod is larger than the radius of the telescopic type insulation rod and is smaller than the radius of the retaining ring. The diameter of the retaining ring is large enough to satisfy the rotation requirement of the high-voltage detector, and the incidence point of the infrared emitter is always kept onto the retaining ring. According to the technical scheme of the utility model, when the equipment is detected to be electrified, the infrared emitter emits an infrared ray onto the retaining ring. Then the voice indication module is driven to sound an alarm. Therefore, the reliability of electroscopic operation is improved.