Electrical secondary equipment locking device

The utility model discloses a locking device for electrical secondary equipment, which belongs to the technical field of electrical secondary locking and comprises a shell, a locking box is fixedly connected to the inner bottom wall of the shell, a thrust rod is slidably connected to the inner wall of the locking box, and an insulating rod is fixedly connected to one end, close to the locking box, of the thrust rod. Five movable plates are rotatably connected to the outer surface of the insulating rod, movable contacts are movably hinged to the ends, away from each other, of the movable plates, ten limiting boxes are fixedly connected to the inner bottom wall of the locking box, each movable contact is located in the corresponding limiting box, and two wire holders are fixedly connected to the inner side wall of the locking box; five lug plates are arranged in each wire holder, a threaded nail is in threaded connection with the interior of each lug plate, and conductive columns are fixedly connected to the si