This paper first analyzes the requirements of dual pipe air supply system for passenger train. Then mainly introduce the structure, system principal, design plan, and operation instruction of the AC passenger locomotive dual pipe air supply system. At last propose some suggestions to simplify the design of dual pipe air supply system in the locomotive which is no need to operat-ing in multiple.%对客运列车双管供风系统进行了需求分析，主要介绍了交流传动客运电力机车双管供风系统的结构组成、系统原理、设计方案及操作方法，并针对无重联需求机车双管供风系统提出了简化设计建议。
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