According to the characteristics of highway tunnel inner contour, this paper researched the quickly identified method and process of tunnel inner contour shape from the geometric relationship, and taking the help of computer program design, implementation of the highway tun-nel inner contour fast, optimization design.%根据公路隧道内轮廓的特点，从几何关系方面研究了隧道内轮廓形状快速确定的方法及过程，并借助于计算机程序设计，实现了对公路隧道内轮廓的快速、优化设计。
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