The invention relates to a turbocharger which comprises a turbine shell (5), a turbine (7), a rotor shaft (6), a body (2), a thrusting bearing cover (4), a radial thrusting bearing (3), an impeller shell (1) and an impeller (9). The radial thrusting bearing (3) comprises a radial metal rubber block type air bearing, a radial thrusting bearing rotor shaft and a thrusting metal rubber block type air bearing and the radial metal rubber block type air bearing and the thrusting metal rubber block type air bearing respectively comprise a bearing metal rubber block, a bearing elastic foil sheet and a bearing top-layer foil sheet. The turbocharger has the advantages of being suitable for energy recovery of engine tail gas and air inlet supercharge of an engine, capable of avoiding the influence, caused by oil leakage of the turbocharger, on correct timing of the engine through the air bearings, suitable for large-discharge engines due to the small air lubrication resistance and high product rotation speed, long in service life due to the fact that direct physical contact between the surface of the rotor shaft and the inner surface of the bearing is avoided, and remarkable in high-temperature-resistant performance due to the fact that a bearing medium of the bearing is air.