Shock-resistant three-position switch

An anti-impact three-position switch provided by the present invention comprises a supporting seat, the top of the supporting seat is provided with a vacuum arc-extinguishing chamber, one side of the vacuum arc-extinguishing chamber is connected with a plurality of circuit breaker outgoing line bars at equal intervals, and the bottom of the vacuum arc-extinguishing chamber is connected with a plurality of three-position switch static contacts at equal intervals. A plurality of three-position switch moving contacts are connected to the inner bottom face of the supporting seat at equal intervals, a side plate is fixedly connected to the lower end of one side of the supporting seat, a plurality of ground contacts are arranged in the side plate at equal intervals, two connecting plates are connected to the side, close to the side plate, of the supporting seat from top to bottom, and a supporting plate is horizontally arranged on the side, close to the connecting plates, of the side plate. One side of the supporti