The invention discloses a substation no-dead-corner monitoring device, which comprises a vehicle body base, a vehicle body upper cover and a running gear and the like. The vehicle body upper cover is arranged on the vehicle body base; two slide rails are arranged in parallel on the vehicle body upper cover; the two ends of a lower fixation shaft are arranged at one end of each of the two slide rails respectively; a cylinder body of a pitching cylinder is hinged onto a pitching table; the end portion of a piston rod of the pitching cylinder is hinged under the pitching table; a rotating motor is arranged on the pitching table; and a spindle of the rotating motor is equipped with a camera. Through the convenient running gear and the flexibly-adjustable monitoring device, the purpose of no-dead-corner monitoring of the substation is realized; and the monitoring device is reasonable in structure and convenient to operate.