超硬刀具广泛应用于金属切削、木材加工、采矿和石油勘探等领域。然而由于其硬度高、耐磨性好，用传统的方法很难对它加工成形。文章论述了超硬刀具电火花刃磨的原理及其脉冲电源的研制，并就电参数对刃磨效率和表面粗糙度的影响进行了实验研究。 Superhard tools are widely used in metal cutting, wood processing, mining and oil exploration and other fields. However, due to its high hardness, good wear resistance, it is difficult with the traditional method of forming it. In this paper, the principle of EDM sharpening for superhard cutting tools and the development of pulse power source are discussed. The effects of electrical parameters on sharpening efficiency and surface roughness are also studied.