Abstract: Combined with the first and second level in the <>nowadays,this paper discusses the principles and the methods of executing the third level climatic zoning for highway in Sichuan and Chongqing,so that the climatic zoning for highway between provinces can provide more comprehensive fundamental data,and enhance the operative ability and the utility of the climatic zoning for highway.

Key words: highway, natural regionalism, principles, methods

摘要： 结合现行<公路自然区划标准)中的一、二级区划，本文探讨了在四川、重庆地区进行公路三级自然区划的原 则以及区划方法问题，使得省际公路区划可以更好的为当地公路的建设提供较为全面的基础资料，提高公路自然 区划的操作性和实用性．

关键词: 公路, 自然区划, 原则, 方法