The utility model relates to a turning bracket for a roller with a bearing box. The turning bracket comprises guide supporting pillars, positioning bolts, a base and a limiting plate. The guide supporting pillars are fixed to the base. The limiting plate is fixed to the bottom of the base. The guide supporting pillars are symmetrically arranged on the two sides of the limiting plate. The interval of the guide supporting pillars is matched with the width of the bearing box. The guide supporting pillars are connected with the positioning bolts through a screw thread pair. The turning bracket has the advantages that the turning bracket is simple in structure, the purpose that turning is conducted on the roller with the bearing box on a machine tool is achieved, the length of turning is not limited, and production efficiency is improved; the bracket is placed on a machine tool rail and can be adjusted back and forth; the roller with the bearing box is placed on the bracket, the height of the center of the roller is made to be matched with that of the center of the machine tool, the front-rear distance is adjusted through the positioning bolts, the center line of the roller is matched with the center line of the machine tool, the turning bracket is convenient and fast to use, and the ideal target is achieved without purchasing a new machine tool.