Switching device for two groups of electrodes of corona treatment unit

The utility model discloses a switching device for two groups of electrodes of a corona treatment unit, which can solve the technical problem of burnout caused by arc discharge when a switching head leaves or cuts in during switching of the existing switching device. The device comprises a piston cylinder, the piston cylinder is longitudinally fixed on a mechanical frame, a magnetic switch is arranged on the piston cylinder, the bottom end of a piston rod of the piston cylinder is connected with a movable contact, and the movable contact is connected with a corona generator connecting wire; the vacuum circuit breaker further comprises a static contact, the static contact is arranged in a box body, insulating oil is contained in the box body, and the box body is arranged below the piston air cylinder. The static contact comprises an upper contact and a lower contact; the upper contact and the lower contact penetrate through the box body and are connected with two groups of external different electrodes in a on