Abstract: Cubic boron nitride is widely used in modern manufacturing field, with its excellent characteristics.The performance requirements of cubic boron nitride are higher with the continuous improvement of manufacturing requirements, many countries in the world have developed the synthetic technology of pure phase of cubic boron nitride.In this paper, many efforts have been made to research preparation methods of polystalline cubic boron nitride (PCBN) without additive all over the world, and the various sintering methods of pure phase are also analyzed.Finally, the future development trend of PCBN without binder is prospected.