Novel　materials　with　anti-aging　functionality　play　a　crucial　role　in　delaying　the　aging　process　and　extending　the　service　life　of　asphalt　pavement.　The　objective　of　this　study　is　to　employ　an　improved　mathematical　TOPSIS　method　to　optimize　the　best　anti-weather　aging　combination　for　high-content　polymer　modified　asphalt　(SHCPMA).　Firstly,　the　selection　of　light-absorbing　materials,　light-shielding　materials,　and　antioxidants　was　conducted　based　on　UV-vis　spectroscopy　test,　resulting　in　eight　unique　anti-aging　combination　schemes.　Then,　an　accelerated　weather　aging　test　was　performed　on　SHCPMA　to　simulate　its　long-term　outdoor　aging　process.　Subsequently,　a　comprehensive　investigation　of　the　macro-rheological　properties　and　micro-chemical　properties　of　SHCPMA　was　carried　out　using　rheological　tests,　Fourier　transform　infrared　spectroscopy　test,　and　gel　permeation　chromatography　test.　Finally,　a　comprehensive　analysis　was　conducted　using　TOPSIS　method　to　determine　the　optimal　anti-weather　aging　combination.　The　results　showed　that　UV531,　NanoTiO2,　Irganox1010　+　Irgafos168　were　the　preferred　light-absorbing,　light-shielding,　and　antioxidant　materials,　respectively.　These　three　types　of　anti-aging　materials　can　effectively　absorb　solar　radiation,　shield　solar　radiation,　and　neutralize　free　radicals,　thereby　inhibiting　the　formation　of　polar　oxygen-containing　functional　groups,　and　the　degradation　of　polymer　molecules　during　weather　aging.　The　improved　TOPSIS　method　indicated　the　combined　use　of　three　types　of　anti-aging　materials　can　maximize　SHCPMA＇s　resistance　to　weather　aging,　and　the　synergistic　effect　of　light-absorbing　material　and　light-shielding　material　was　also　ideal　in　terms　of　anti-aging　performance.　The　optimization　of　anti-aging　materials　contributes　to　prolonging　the　road　service　life,　thereby　promoting　sustainable　development　in　pavement　engineering.