In order to reveal the distribution and change of internal temperature field of full ceramic ball bearing under the condition of oil lubrication,improve the operation performance and service life of full ceramic ball bearing,taking 7007C silicon nitriding full ceramic angular contact ball bearing as an example,the internal temperature field and lubricating oil distribution of full ceramic ball bearing under different working conditions and viscosity conditions were simulated and analyzed by using simulation software.The dynamic characteristics tests of the full ceramic ball bearing were carried out on the bearing life testing machine under the same conditions to study the temperature rise characteristics of the full ceramic ball bearing under the condition of oil lubrication.The results show that with the increase of the speed of the bearing,the temperature of the cavity increases and the volume fraction of lubricating oil decreases.By changing the lubricating oil with different viscosities,it is found that the optimal viscosity value makes the temperature of the full ceramic ball bearing chamber reach the minimum value,and the bearing has the best service performance.The research results provide a technical reference for the selection of optimal lubricating oil for full ceramic ball bearings in practical production.