This paper introduces the principle and working process of pneumatic control system of a kind of transmissions, studies its design methods and mathematical equation and optimizes the parameters by matlab software. In the optimization process, it also studies the basic design rules of this kind of systems and the relationships between these design parameters and the objective pa-rameters and points out the special attentions in design process of this kind of systems.%以一种汽车变速器操纵装置气路控制机构的原理及工作过程出发，研究其设计的基本方法，用其准确的数学物理模型进行描述，并借助matlab软件进行参数的优化设计。在参数的优化设计过程中，研究其设计的基本规律和相关参数与目标功能参数之间的关系，并指出了在进行该类机构的设计过程中特别需要注意的事项。
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