Abstract: The present invention provides an all-ceramic joint bearing used in a high-temperature, corrosion and oxidation-prone environment, which mainly includes an inner ring and an outer ring which are made of zirconia, alumina or silicon carbide ceramic materials. The all-ceramic joint bearing is assembled into a whole through corresponding assembly technologies. An inner side of the outer ring is an inner arc surface, and the inner ring is an outer arc surface. A width of the inner ring is 3-5 mm greater than that of the outer ring, and a movable swing angle of the inner ring is 0-21°. The joint bearing made of the ceramic materials has an optimized structure by utilizing the ceramic material characteristics of high temperature resistance, corrosion resistance, high hardness, non-magnetic permeability, wear resistance and self-lubrication.