QG159 type pipe cutting machine for cutting off seamed or seamless steel tubes, diameter φ89-φ159mm between roller tube processing length by length of user needs, the minimum of not less than 200mm, while cutting off the ends of the tubes were cut chamfer. The machine has operations workers will be cut into the back of the machine feeding tube small, the machine will automatically manipulate the workpiece chucking, feeding, cutting, chamfering, blanking. The machine adopts PLC control electrical and hydraulic systems, high production efficiency, skilled workers can produce 350-450 a class for a mass belt conveyor idlers crust forming, and cut pipe and tube truss construction industry chamfer.