This paper explores the DTM application in highway engineering,analyzes the necessity and significance of DTM application in highway survey and design,takes CASS7.0 as the auxiliary design software,and shows the specific application of DTM in highway design from four aspects of stereoscopic graphics generation,vertical section profile drawing,earthwork calculation and complex section profile generation,which has certain realistic meaning for promoting the integrity technique development of highway survey and design.%针对公路工程中的DTM应用进行了探讨,分析了DTM用于公路勘测设计的必要性和重要性,以CASS7.0为辅助设计软件,从三维立体图生成、纵断面图绘制、土方量计算和复杂断面图生成四个方面给出了DTM在公路设计中的具体应用,对推进公路勘测设计一体化技术发展具有一定的现实意义。
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