The invention relates to a high-voltage electroscopic device of an unmanned aerial vehicle, which is applied to the field of power system transmission line operation, urgent accident repair and equipment maintenance. The high-voltage electroscopic device of the unmanned aerial vehicle comprises an electroscopic indicating module, a connecting module and an unmanned aerial vehicle module, wherein the electroscopic indicating module consists of a high-voltage electroscope and a contact head arranged at the front end thereof; the back end of the high-voltage electroscope is movably arranged at the bottom of the unmanned aerial vehicle module through the connecting module; an indicating module is arranged on the high-voltage electroscope. The high-voltage electroscopic device of the unmanned aerial vehicle has the advantageous effects as follows: through observation on an indicating device, whether a transmission line or equipment is live is judged, so that the safety is improved; throughthe connecting module, the direction of the high-voltage electroscope is adjusted, so that contact of the high-voltage electroscope and the transmission line or the equipment is facilitated, and thusthe electroscopic working efficiency is improved; through a monitoring part, whether the contact head of the high-voltage electroscope is in contact with the transmission line or the equipment is accurately observed, so that the accuracy is improved.