Compact high-current contact structure and three-position switch using same

The invention provides a compact high-current contact structure and a three-position switch using the same. The compact high-current contact structure comprises a contact grid, a moving contact, an isolating switch static contact seat, a contact seat, a grounding switch static contact seat and a contact grid, and the contact grid comprises a plurality of contact pieces, a plate spring, a shaping spring and a fixing ring. Each phase three-position switch can complete various functions of the three-position switch only by using two compact large-current contact structures, the size of the three-position switch is reduced, the rated current can reach more than 4000 A under the condition that the size of a switch cabinet is not increased, and similarly, the size of the three-position switch can be reduced. The compact contact structure can be conveniently used for gas insulated metal-enclosed switchgear (GIS), gas insulated transmission lines (GIL), high-voltage cable joints, transformer outgoing bushings, air bu