The　goal　of　this　paper　is　to　reveal　the　influence　of　temperatures　on　the　triaxial　strength　of　asphalt　mixtures.　The　triaxial　compression　and　triaxial　tensile　tests,　as　well　as　plane　tensile　and　compression/axial　tensile　tests,　which　were　developed　by　the　self-developed　triaxial　test　equipment　to　carry　out　the　complex　stress　state　under　different　temperatures　(5　degrees　C,　10　degrees　C,　15　degrees　C,　20　degrees　C,　and　25　degrees　C),　were　performed　on　the　asphalt　mixture.　The　ultimate　failure　strength　of　the　material　shows　that　the　temperature　and　stress　state　significantly　affect　the　triaxial　strength　characteristics　of　the　asphalt　mixture,　and　the　three-dimensional　strength　decreases　by　the　increase　in　temperature.　Under　the　triaxial　compression　and　triaxial　tensile　stress　state,　the　resistance　of　the　octahedral　shear　stress　increases　with　the　hydrostatic　stress.　A　three-dimensional　strength　calculation　model　is　established　based　on　the　influence　of　temperature　and　characterization　by　the　tensile　meridian,　compression　meridian,　and　failure　strength　envelope.　It　reveals　the　change　of　failure　strength　envelope　with　increasing　temperatures　and　decreasing　hydrostatic　stress　under　complex　stress　state.　It　provides　experimental　and　theoretical　references　to　the　design　of　asphalt　pavement　structure　of　different　temperature　conditions　according　to　the　three-dimensional　stress　state.