改拓建是公路建设的基本方式之一 ,随着社会经济和交通运输事业的飞速发展 ,公路建设的规模日愈扩大 ,而对改拓建工程日愈突出的施工保通与运营安全矛盾 ,本文结合云南昆玉、安楚高速公路建设的经验和教训 ,系统分析规划曲小高速公路改拓建工程勘察设计的中心理念 ,以谋求改拓建工程尽善尽美的总体设计思路和综合设计原则以及保通措施 Reform and extension construction is one of the basic ways of highway construction. With the rapid development of social economy and transportation, the scale of highway construction is expanding day by day. However, the contradiction between construction and distribution and operation safety, Based on the experience and lessons learned from the construction of Yunnan Kunyu and Anchu Expressways, this paper systematically analyzes and plans the central idea of ​​the exploration and design of QuXiao Expressway to expand and construct the project, in order to seek the perfect design concept and comprehensive design principle of extension and construction project, Through measures