Contactor capable of preventing short circuit damage

The contactor comprises an insulating shell, a static iron core, a movable iron core and a contact mechanism, the static iron core, the movable iron core and the contact mechanism are arranged in the insulating shell, the static iron core is fixedly arranged at the inner bottom of the insulating shell, the static iron core is sleeved with an electromagnetic coil, the movable iron core is connected with the insulating shell through a spring assembly, and the movable iron core comprises a movable iron core body. An iron column is fixedly connected below the iron core body; the contact mechanism comprises a first contact assembly fixedly arranged on the iron core body and a second contact assembly fixedly connected with the inner top wall of the insulating shell; short circuit prevention mechanisms are arranged between the adjacent first contact assemblies and between the first contact assemblies and the side wall of the insulating shell, each short circuit prevention mechanism comprises an insulator fixedly arr