Centering　on　the　best　choice　among　various　solutions　to　the　feasibility　study　of　freeway　projects　in　China,　this　paper,　on　the　basis　of　analyzing　the　effects　of　the　construction　solutions　of　freeways,　has　established　a　practical　model　of　comprehensive　evaluating　system　by　adopting　the　method　of　goal　decomposition.　In　order　to　avoid　fuzziness　of　indication　weight　of　construction　matrix　by　adopting　the　method　of　AHP,　an　improved　method　of　three-mark　AHP　is　introduced.　The　widely　used　arithmetic　introduced　will　surely　make　the　decision-making　in　the　feasibility　study　of　the　freeway　more　criterions　and　more　scientific.　The　widely　used　arithmetic　introduced　will　surely　make　the　decision-making　in　the　feasibility　study　of　the　freeway　more　criterions　and　more　scientific.