介绍了硬质合金自回转刀具工作原理及结构特点．并通过与可转位刀具的对比切削试验．证明其切削力小．刀具磨损轻微；在切削难加工材料时，宜在高速和较大进给量条件下工作．是切削难加工材料比较理想的刀具． The working principle and structural features of carbide self-turning tool are introduced. The cutting test was compared with indexable tools. Prove that its cutting force is small. Tool wear is minimal; when working with difficult-to-machine materials, work at high speeds and at high feed rates. Cutting difficult materials ideal tool.