English：

The merger setting of the expressway and the interchange has three merger setting schemes inthe specification, and the comprehensive selection of different schemes plays a very important role inproject design stage. At present, the scheme comparison in the merger setting project cases is simply tocompare the advantages and disadvantages to select the most suitable solution. In this paper, the fourthscheme of merging the interchange and the service area is proposed, and based on the actual engineeringcase, the scheme comparison method combining analytic hierarchy process and technique for order preferenceby similarity to an ideal solution is proposed, and the qualitative and quantitative indicators in the project arecomprehensively selected, so that the results of the comparison are more scientifically based.