冠部设计是PDC钻头总体设计的一个重要组成部分，过去一直是凭经验设计，缺乏理论依据，随意性较大。鉴于此，根据PDC钻头冠部设计的基本要求，推导出了按等切削、等磨损和等功率原则设计的理论冠部曲线方程式，解决了PDC钻头设计中长期存在的理论问题，并建立了计算机辅助冠部设计的方法和相应的计算机程序。运用该方法进行冠部设计，可以提高设计的科学性和准确性。该方法已在生产实践中得到应用，取得了很好的使用效果。 Crown design is an important part of the overall PDC bit design, the past has always been based on empirical design, lack of theoretical basis, more arbitrary. In view of this, according to the basic requirements of the PDC bit crown design, the theoretical crown curve equation designed according to the principle of equal cutting, equal wear and equal power is deduced to solve the long-standing theoretical problem in PDC bit design, and a computer Auxiliary crown design method and the corresponding computer program. The use of the method of crown design, can improve the scientific design and accuracy. The method has been applied in production practice and achieved good results.