Pole-mounted vacuum circuit breaker

The invention discloses a pole-mounted vacuum circuit breaker, which belongs to the technical field of vacuum circuit breakers, and comprises a mechanism box and a plurality of pole columns arranged on the mechanism box, insulation pull rods are arranged on the pole columns, the insulation pull rods are arranged on the mechanism box in a sliding and penetrating manner, a plurality of guide columns are arranged on the mechanism box, and the guide columns are in one-to-one correspondence with the insulation pull rods. The guide column is slidably sleeved on the insulation pull rod, the guide column is provided with a guide sliding groove used for being in sliding fit with the insulation pull rod, the insulation pull rod is fixedly connected with a first air bag, a driving plate is arranged in the mechanism box in a penetrating mode, the guide column is slidably arranged on the driving plate in a penetrating mode, and the driving plate is provided with a driving sliding groove used for being in sliding fit with