The invention relates to a split bearing. The bearing which comprises an outer ring, an inner ring, a retaining support, a spherical surface roller and an inner ring locking ring is characterized in that the symmetrical outer ring is formed by the butt joint of two half-edge structures; and the joint of the outer ring and a position which is on the outer diameter, perpendicular to the outer diameter and close to the subdivision part are respectively provided with two circular holes, two circular grooves perpendicular to the two circular holes are milled on the other half of the subdivision part, and a connecting piece connects the two half outer rings into one body. According to the invention, the outer ring is fixed on the outer diameter without an outer ring locking ring, so the processing operation of the bearing is reduced, the weight of the bearing is reduced, the manufacturing cost is reduced, the whole packaging of the split bearing is solved, and a grinding catching / gripping problem is solved, thereby the bearing of the invention brings great conveniences for manufacturers and users.