The bearings currently in use can usually be divided into rolling bearings and sliding bearings; the operating principles of rolling bearings and sliding bearings can be distinguished by the title. The conflict that occurs during the operation of the sliding bearing is the rolling conflict, and the conflict occurs during the operation of the sliding bearing. What is the sliding conflict; the size of the rolling conflict force is mainly determined by the production accuracy; and the size of the conflict force of the sliding bearing mainly depends on the data of the bearing sliding surface. Sliding bearings usually have self-lubricating function on the working surface.