Due　to　viscoelastic　characteristics,　the　strength　values　of　the　high-modulus　asphalt　mixtures　(HMAM)　obtained　under　different　conditions　(temperatures,　loading　rates,　and　stress　states)　are　quite　different,　and　the　serving　conditions　of　asphalt　pavements　are　also　varied.　Thus,　the　strength　under　fixed　conditions　cannot　reflect　the　mechanical　performances　of　materials　under　real　serving　conditions,　which　leads　to　inaccuracies　in　the　asphalt　pavement　structural　design.　To　develop　a　precise　strength　evaluating　method　for　high-modulus　asphalt　mixtures,　the　strength　tests　of　high-modulus　asphalt　mixtures　were　implemented　under　different　conditions　(temperatures,　loading　rates,　and　stress　states)　in　this　study.　The　test　results　indicated　that　for　each　stress　state,　the　variation　of　strength　with　loading　rates　under　different　temperatures　can　be　characterized　by　power　functions,　and　the　variation　of　strength　with　temperatures　under　different　loading　rates　can　be　characterized　by　exponential　functions.　The　uniform　characterizing　model　of　strength　under　different　conditions　was　established　through　the　dimensionless　method　and　the　sigmoidal　function.　With　the　effects　of　temperature,　loading　rates,　and　stress　states　included,　the　strength　obtained　can　better　reflect　the　mechanical　performances　in　actual　pavement　serving　conditions.　The　research　results　contribute　to　the　improvement　of　the　structural　resistance　design　of　the　asphalt　pavement　with　high-modulus　asphalt　mixtures.