Lock cylinder shell machining clamp

The utility model relates to a lock cylinder shell machining clamp, and belongs to the technical field of clamps. The device comprises a workbench and a mounting base arranged on the workbench, the mounting base comprises a fastening cylinder, a sleeve arranged on the fastening cylinder in a sleeving mode and a driving mechanism for driving the sleeve to move in the axis direction, and one end ofthe fastening cylinder is fixedly connected with the workbench while the other end of the fastening cylinder is arranged in a suspended mode; a plurality of waist-shaped holes penetrating through thecylinder wall of the fastening cylinder are formed in one end, which is arranged in a suspended manner, of the fastening cylinder; a first guide face is arranged on the outer wall of the overhanging end of the fastening cylinder and is a circular truncated cone face, the opening area, close to the workbench, of the first guide face is larger than the opening area, away from the workbench, of the first guide face, a second