The utility model relates to an on - -spot electricity inspection auxiliary device with master lever spare, master lever spare is provided with the swing section of thick bamboo that accessible angleadjustment mechanism carries out the angle modulation including action bars, the top of action bars, sets up camera and flash light on the swing section of thick bamboo, and the tail end of action bars has the connection tailstock of connecting the extension member. The utility model discloses a can enlarge the observation range of camera to the regulation of swing section of thick bamboo angle, to the position conceal or be in that the space is narrow, can effectively being observed by the inspection object of corner, it can also come the higher inspection object of observation position through the mode of connecting extra long member to connect behind the extension bar still can be under random lengths effectively to swing tin on and the camera angle adjust.