Rack bushing for improving rack stability

The utility model relates to a rack bushing, in particular to a rack bushing capable of improving the stability of a rack. The rack bushing is composed of a bushing body, left contraction grooves are evenly distributed in the bushing body in the circumferential direction, and a right contraction groove is further formed in the bushing body. And an elastic hoop is mounted on the circumferential surface of the bushing body through an assembly shrinkage ring groove. The rack bushing can be radially shrunk after being worn, so that the rack is supported by the bushing body, the supporting force of the bushing body on the rack is ensured, and the stability of the rack is further ensured; due to the radial shrinkage of the bushing body, a gap between the bushing body and the rack can be ensured, so that abnormal sound is not easy to generate between the rack and the bushing body; after the lining body is abraded, the rack can be continuously supported through radial shrinkage, so that the rack can be continuously u