Extrusion roller sleeve with high wear resistance and easiness in repair

The utility model relates to the field of extrusion roller sleeves, in particular to an easy-to-repair extrusion roller sleeve with high wear resistance, which comprises a roller body, wear-resistantblocks, check rings and fastening bolts. Wear-resisting blocks are arranged outside the roller body, are sequentially connected in the length direction of the roller body and then are as long as the roller body, and the wear-resisting blocks are sequentially connected in the circumferential direction of the roller body to form a closed ring. Wherein dovetail grooves, threaded holes and the like are formed in the roller body, each wear-resisting block comprises a wear-resisting base body with dovetail convex edges, a wear-resisting long strip and a wear-resisting arc strip, the dovetail groovesand the dovetail convex edges are connected in a matched mode to assemble the roller body and the wear-resisting blocks together, and the check rings, the roller body and the wear-resisting blocks are assembled into a whole t