Switching device for preventing secondary loop DC looped network

The utility model relates to the technical field of secondary circuits, and discloses a switching device for preventing a DC looped network of a secondary circuit, which comprises a mounting plate, a power box is mounted at one end of the mounting plate, two groups of storage batteries are arranged in the power box and are connected in parallel, two anode contacts are mounted at the end part of the power box, and two cathode contacts are mounted at the other end of the power box. A U-shaped support is mounted on the side, away from the power box, of the end of the mounting plate, two cathode contacts are mounted at the end of the U-shaped support and connected with an external element through wires, and the external element is connected with cathodes of the two storage batteries. A first electric push rod and a second electric push rod are mounted at the ends of the mounting plate correspondingly. The positions of the first connecting piece and the second connecting piece can be adjusted through the first ele