Cutting tool for screw

The utility model discloses a cutting tool for a screw, and particularly relates to the field of screw processing, the cutting tool comprises a workbench for cutting the screw, one side of the workbench is fixedly connected with a sliding mechanism for cutting the screw, the sliding mechanism comprises a motor, a transmission belt, a belt wheel, a movable seat, a thread bushing and a screw rod, one side of the motor is fixedly connected with a lead screw; through the structural design of the sliding mechanism, the output end of the motor drives the lead screw to rotate through the coupler, the threaded sleeve is meshed with the surface of the lead screw, the threaded sleeve is fixedly connected with the left rack, the connecting shaft and the cutting sleeve are fixedly connected through meshing of the threaded rod and the threaded groove, and then the cutting sleeve is driven to rotate; the inside of the cutting sleeve is matched with the outside of the screw body, and the surface of the screw body is cut thr