Ceramic materials have excellent self-lubricating properties due to their high hardness and smoothness, and can meet general use conditions. If the equipment does not have high requirements for the speed, noise, temperature and other performance of the bearing, it can be put into use without lubrication. However, in most working conditions such as high load, high speed, and harsh environment, lubrication is still necessary, otherwise it will also reduce the service life of the bearing. Common lubrication methods for ceramic bearings include oil lubrication, grease lubrication, solid lubrication, and mixed lubrication (some ceramic bearings); the key factors in selecting the lubrication method depend on the operating conditions, maintenance requirements, and performance goals.