叙述了外插齿刀设计新方法的基本原理、转换后插齿刀变位系数选择的各限制条件、限制区域的形成及其与插齿刀齿顶圆半径计算曲线之间的关系， 并通过实例介绍了其设计步骤． 该方法克服了传统设计方法的缺点， 不但应用范围广、计算简单、设计效率高而且可判断设计的可行性． The basic principle of the new design method of the gear cutter is introduced. The limitations of the selection of the gear shift coefficient of the gear cutter after conversion, the formation of the limit area and the relationship between them and the calculation curve of the tip circle radius of the gear cutter are described. The example introduces its design steps. The method overcomes the shortcomings of the traditional design method, not only has wide application range, simple calculation, high design efficiency, but also can judge the feasibility of the design.