Hanging tool and machining device

The utility model relates to the technical field of hanger equipment, aims to solve the technical problem that a known hanger cannot stably hang a cylindrical workpiece and reduce the defects of the inner surface of the cylindrical workpiece at the same time, and provides a hanger and a machining device. Wherein the hanging tool is used for hanging a target piece, the target piece is provided with a hole part, and an opening of the hole part is the end face of the target piece. The hanging tool comprises a rigid part and two elastic pieces. Each elastic piece comprises a connecting section and an abutting section, the connecting sections of the two elastic pieces are arranged on the rigid part at intervals, the abutting sections are bent in the direction away from the rigid part and connected to the connecting sections, and the abutting sections of the two elastic pieces can stretch into the hole part, make linear contact with the inner surface of the hole part and apply elastic force in the different radial