Self-resetting buckling-restrained steel support device

The utility model relates to a supporting device, in particular to a self-resetting buckling-restrained steel supporting device which comprises a base, a fixing cylinder is fixed on the base, and a plurality of fixing pieces are fixed at one end, far away from the base, of the fixing cylinder. The fastening structure is in threaded connection with the fixing cylinder, and the fastening structure can extrude the fixing piece or break away from the extrusion state of the fixing piece when axially moving relative to the fixing cylinder; and a fixing structure is further rotationally mounted on the fastening structure, is used for clamping the steel pipe and can move along with the fastening structure when the fastening structure moves. The fastening structure drives the fixing structure to extrude the fixing pieces to get close to the middle, the inner walls of the fixing pieces are attached to the outer wall of the steel pipe, the multiple sets of fixing pieces fix the steel pipe in multiple directions, the ste