根据等强度优化理论，通过分析齿面接触疲劳强度和齿根弯曲强度的内在联系，引进复合齿形系数和齿数算子的概念，提出了一种能直接求得齿轮传动优化参数的简便方法。将该方法用于二级或多级齿轮减速器的优化设计，其优化过程更为直观、清晰，编程更为简单、快捷。 According to the equal strength optimization theory, the concept of compound tooth profile coefficient and gear operator is introduced by analyzing the inherent relationship between tooth contact fatigue strength and root bending strength, and a simple and straightforward way to obtain the optimization parameters of gear drive directly is proposed. The method is applied to the optimization design of gear reducer with two or more stages, the optimization process is more intuitive and clear, and the programming is simpler and faster.