The invention discloses an oil-gas lubrication method. The method comprises the steps that first, a PLC control system controls an entire oil-gas lubrication process and is sequentially connected with an oil pump, an electromagnetic valve, a distributor, an oil and gas mixer, a lubrication part and an oil return box; second, an oil box is connected with the oil pump; third, an air compressor is connected with the oil and gas mixer through a filter. The oil-gas lubrication method has the advantages that oil consumption (1/8-1/10 of that of oil-mist lubrication) is low, the adaptability (150-680 cst/40 DEG C) to lubricating oil viscosity is wide, oil mist conveying capacity (conveying air pressure is 2-10 bar, and air flow speed is 30-80 m/s) is high, conveying distance (capable of achieving 100m) is long, the sealing effect on a bearing is good (the positive pressure in the bearing is 0.3-0.8 bar), the service life of the bearing is long (the service life is prolonged by 2-4 times), emission of oil mist is avoided, and the environment is not polluted, thereby having high popularization value.