The invention discloses a high-speed large bearing and an oil-gas lubrication structure used for the same. By means of the high-speed large bearing and the oil-gas lubrication structure used for the same, the defects that a high-speed large bearing used for a traditional tubular strander has the rotating speed of 500-600 r/m only when being used, frictional heating occurs in the high-speed operating process, the performance of the bearing is greatly reduced, and the service life of the bearing is greatly shortened; and meanwhile, a complex sealing structure is adopted for sealing of the bearing, however, the end oil leakage phenomenon also occurs due to high-speed operation despite sealing by means of the complex structure can be overcome. The high-speed large bearing comprises a bearing pedestal and a bearing body mounted inside the bearing pedestal. Sealing structures are arranged at the two ends of the bearing body correspondingly. Oil inlets are formed in the middles of the sealingstructures correspondingly. The oil-gas lubrication structure used for the high-speed large bearing comprises an oil tank, a pneumatic pump, an oil-gas mixer and an oil-gas distributor. The oil inlets are connected with the bearing body, and the bearing body is connected with the oil-gas lubrication structure.