互通式立交设计的主要内容是匝道设计,而匝道设计的关键是出入口的平、纵面接线设计。文章通过设计实例,详细介绍了习惯设计法和流行设计法2种匝道平面接线设计方法,对匝道纵面接线设计方法分别介绍了合成坡度法和平均坡度法。 The main contents of the interchange design is ramp design, and ramp design of the entrance and exit of the flat, vertical wiring design. Through design examples, this paper introduced two kinds of ramp plane connection design methods of customary design method and popular design method in detail. Synthetic slope method and average slope method were introduced separately to the design method of ramp longitudinal connection.