The　Eco-design　of　road　building　materials　that　the　environmental　load,　performance　and　economic　cost　of　the　material　will　be　considered　into　the　material　design　process,　with　the　idea　of　life　cycle　assessment　as　a　guide,　through　the　ecological　reconstruction　can　make　the　materials　in　harmony　with　the　environment.　This　study　conducted　an　Eco-design　of　steel　slag　asphalt　concrete　road　surface　through　the　steps　including　the　determination　of　product　design　objectives,　needs　analysis,　design　implement　and　evaluation　with　the　natural　stone　asphalt　concrete　as　a　reference.　The　results　show　that　the　life　cycle　environment　load　of　the　steel　slag　asphalt　concrete　is　about　14.17%　lower　than　natural　stone　asphalt　concrete　and　31.87%　higher　than　their　using　performance,　the　economic　cost　of　1　km　road　construction　is　8.37%　lower　than　the　steel　slag　asphalt　concrete　required,　the　Eco-design　comprehensive　evaluation　result　is　greater　than　natural　stone　asphalt　concrete,　so　the　steel　slag　asphalt　concrete　are　better　than　natural　stone　asphalt　concrete　in　the　environmental　load,　using　performance,　economic　cost　and　overall　performance,　we　can　get　a　conclusion　that　the　steel　slag　asphalt　concrete　pavement　is　more　in　line　with　the　Eco-design　requirements　than　natural　stone　asphalt　concrete　pavement,　which　provide　the　basis　for　the　green　design　and　selection　of　road　building　materials.　©　2016,　The　Editorial　Board　of　Materials　China.　All　right　reserved.