本文论述应用优化理论使齿轮变速箱的设计布局合理、结构紧凑、材料节省,而用计算机运算加快设计进程,提高设计质量,并采用阻尼技术及多种措施来减低它的振动及嗓声.这些方法不仅适用于一般机械,也适合于铁路工厂各种机械、专机中的齿轮变速箱设计. This paper discusses the theory of application optimization to make gearbox design and layout reasonable, compact structure, material saving, and computer operation to speed up the design process to improve the design quality, and the use of damping technology and a variety of measures to reduce its vibration and voice. The method is not only suitable for general machinery, but also suitable for gearbox design of various machines and special planes in railway factories.