The invention discloses a pressure-self-gravity gas static-pressure radial slide bearing applied to a turbocharger. The turbocharger comprises a middle body which is provided with a hollow cavity andis provided with openings in two ends, and a rotor, wherein the rotor is sleeved by the middle body and the two ends of the rotor extend to the outside of the middle body; one end of the rotor is equipped with a gas compressor impeller, and the other end of the rotor is equipped with a turbine motor impeller; a gas compressor housing is mounted on the end surface of one end of the middle body close to the gas compressor impeller; a turbine motor housing is mounted on the end surface of the other end of the middle body close to the turbine motor impeller; a gas static-pressure radial slide bearing is arranged between the rotor and the middle body in a sleeving mode; a gas outlet is formed in the high-pressure cavity of the gas compressor housing; and the gas outlet passes through a one-wayvalve and a gas inlet channel on the middle body to communicate with a gas inlet of the gas static-pressure radial slide bearing. High-pressure gas generated by the compressor is taken as a high-pressure gas source of a static-pressure bearing, and a compression medium is also a lubricating medium of the bearing.