Supporting bearing seat of sizing machine tractor

The utility model discloses a supporting bearing seat of a sizing machine tractor, which belongs to the technical field of bearing seats, solves the problem that the existing device affects the stability of the tractor when the tractor swings, and comprises a fixed bottom plate and a supporting table which form the bearing seat, and the middle part of the top surface of the fixed bottom plate is fixedly provided with the bottom surface of the supporting table; a through circular cavity is formed in the side face of the supporting table, a limiting ring is fixedly arranged at one end of the inner wall of the circular cavity in a sleeving mode, a baffle is arranged at the other end of the inner wall of the circular cavity, and a bearing ring movably arranged in the circular cavity in a sleeving mode is arranged between the baffle and the limiting ring; the inner ring of the bearing ring is movably sleeved with the rotating shaft of the tractor, the rotating shaft of the tractor is sleeved with the bearing ring,