The cutting part of the turning tool is composed of the main cutting edge, the auxiliary cutting edge, the front tool face, the main back tool face and the auxiliary back tool face, and the tool point Angle. The combination of the cutting part and the handle (that is, the clamping part) of the turning tool mainly includes integral, welded, mechanical clamping and weld-mechanical clamping. The mechanically clamped turning tool can avoid the stress and crack caused by the carbide blade during high temperature welding, and the tool handle can be used multiple times. Mechanically clamped turning tools are generally used to clamp the blade with screws and presses, and are equipped with mechanically clamped turning tools with indexable blades. After the blade is blunt, it can be converted to continue to use, and the stopping time for tool change is short, so it has achieved rapid development.