In order to improve the lubrication of rollingsliding bearing,the oil-gas two-phase flow CFD model of slider was established by using two-phase flow theory.The effects of different inlet angles,inlet velocities,oil inlet velocities and lubricant viscosity on oil phase distribution in the flow field were analyzed.The results show that the oilgas mixed lubrication can form an effective lubrication film in the contact area of inner and outer raceways.The angle between oil and gas pipelines affects the distribution of oil droplets,too large angle will result in the adhesion of a large number of oil drops on the side of slider,while too small angle will result in the accumulation of oil drops at the entrance of the outer raceway,and reducing oil supply continuity and oil film stability.Excessive air intake speed will reduce the adhesion rate of oil droplets,and the effective oil film cannot be formed.Excessive oil intake speed will result in accumulation of lubricating oil and the occurrence of oil stirring phenomenon.Therefore,the appropriate oil and air intake speed should be selected to control the size of the oil drop and maintain the continuity of the lubrication process.The viscosity of the lubricating oil will affect the adhesion effect of the oil drop on the slider,the appropriate viscosity of the lubricating oil can ensure uniform oil phase distribution in the flow field