In order to study the gas-liquid-solid three-phase flow state in high-speed bearings, based on the VOF model and DPM model, a three-dimensional bearing cavity multiphase flow model was established, and the liquid-solid two-phase distribution state in the bearing cavity was analyzed at different intake speeds and speeds under the conditions of considering the contact angle and graphene content. The results show that the formation of lubricating oil film in the raceway of the outer ring of the bearing is related to the rotation speed and the intake speed; under different working conditions, the amount of graphene entering the bearing cavity is different; as the speed increases, the diffusion speed of graphene in the bearing cavity in the circumferential direction increases, and the increase in air intake speed increases the speed of graphene diffusion in the axial direction.When the rotation speed is 9 000 r/min, the lubricating oil is easy to form a relatively uniform lubricating oil film.