公路隧道的通风设计是隧道总体设计的重要环节之一，合适的通风方案设计应综合考虑到通风效果、施工难度、设备投入、运营成本等因素。着重介绍美菰林特长隧道通风设计存在的难点，通过原因分析、制定对策并运用现代质量管理理念解决特长隧道通风设计中遇到的困难，较好地把握住通风设计的质量，取得了经济效益、技术效益及社会效益。

 Ventilation design is one of the most important elements of the overall design of highway tunnels. An appropriate ventilation design should consider such factors as the ventilation effect, construction difficulty, construction equipment and operation cost. The authors mainly introduce the difficulties in the ventilation design of Meigulin tunnel. By means of cause analysis, countermeasure selection and modern quality control concept, the authors successfully solve the difficulties in the ventilation design of the extralong tunnel and achieve good ventilation design quality and excellent economic, technological and social benefits.