The invention discloses an oil charging device oil permeating point positioning detector and a using method thereof. The oil charging device oil permeating point positioning detector comprises an insulating rod body and an insulating box body arranged at the top end of the insulating rod body. An electric insulating brush head and a camera are connected to a side plate of the insulating box body, and a plurality of automatic sprayers are arranged inside the insulating box body. A motor is arranged inside the insulating rod body, and switch buttons with different gears are arranged at the lower end of the insulating rod body. The using method comprises the steps of preparing mist spray solvent, rinsing greasing, spraying penetrant, washing the penetrant, spraying white photographic developer, photographing and positioning oil permeating points. By means of the structure and the method, an electrically charged device does not need to be turned off, a user only needs to stand on the ground and turns on the switch buttons of the corresponding gears, then, cleaning agents are automatically sprayed, the electric insulating brush head cleans and scrubs, the penetrant and the white photographic developer are automatically sprayed and photographing is carried out on the oil permeating positions, an operator observes blackened and darkened points of the white photographic developer from a video or an image, and the points are the oil permeating points. Operation is easy and convenient, and the oil permeating points are positioned accurately.