目前，对山区高等级公路深挖路堑边坡设计时，设计方案的比选多用经验或直觉判断的方法，常导致决策或方案的不合理甚至失误而造成重大损失。本文应用灰色理论中灰关联分析法，对设计方案进行优选。这在确定方案、避免或减少设计的失误上有较大的现实意义。 At present, in the design of deep cutting of cutting slopes in mountain high-grade highways, the comparison and selection of design schemes often use experience or intuition to judge methods, which often result in unreasonable or even unjustifiable decisions or schemes and cause heavy losses. In this paper, the gray theory of gray correlation analysis method, the optimization of the design options. This has great practical significance in determining the plan and avoiding or reducing the design mistakes.