The utility model relates to a magnetic control long-life vacuum auxiliary switch. Switch contacts of the utility model adopt dry reed pipes, and a corresponding control device is composed of a rotator, wherein, the interior of the rotator is fixed with a permanent magnet, the dry reed pipes and contact points of terminals at both ends are sealed in a switch casing, and the rotator which is used as the control device is arranged between two dry reed pipes and are controlled by corresponding operation shafts. The switch adopts a multilayer composite structure. The utility model well retains the use function of the prior art, and simultaneously, the utility model has the advantages of good sealing effect of contacts, accurate shift position, reliable motion, long service life, simple structure, etc.