Abstract: A new repairing technology for guide bush of four column hylrolic press is presented.The original solid guide bushes are replaced by newly designed half bushes.It possesses advantages of convenient operation, high efficiency, cost reduction and time saving, etc.This technology is described in detail by taking theguide bush repairing process of hydrolic press Type Y32-250 as an example.The structure of newly designed half bush and its machining process also are given.