Multi-composite treatment self-lubricating steel bushing

The utility model discloses a multi-composite treatment self-lubricating steel bushing, relates to the field of steel bushings, and aims to solve the technical problems that the existing steel bushing is inconvenient to maintain by manually injecting lubricating oil, and the maintenance labor intensity of workers is high. The steel bushing comprises steel bushing bodies arranged in bilateral symmetry and assembling grooves formed in the front ends and the rear ends of the steel bushing bodies, the steel bushing bodies are welded, connected and fixed, a middle bearing ring and side bearing rings with the inner diameter larger than that of the middle bearing ring are fixedly connected to the middle of the inner wall of each steel bushing body, and the side bearing rings are arranged on the upper side and the lower side of the middle bearing ring. A plurality of rollers are annularly arranged on the upper side and the lower side of the inner wall of the steel bushing body, an oil tank is mounted on the inner sid