SBS-modified　high　viscosity　asphalt　(SMHVA)　was　the　core　binding　material　for　constructing　ecological　porous　asphalt　pavements　(PAP).　However,　the　porous　structures　of　PAP　made　SMHVA　susceptible　to　fatigue　damage　and　aging　degradation　damage　during　actual　use.　To　improve　the　damage-repairing　performance　of　SMHVA,　this　study　developed　a　novel　self-reinforcing　chemical　modifier　(SRCM).　The　primary　component　of　SRCM　was　isophorone　diisocyanate　(IPDI),　with　chemically　blocked　active　isocyanate　groups　(-NCO),　providing　excellent　reaction　controllability　and　chemical　repairing　performance.　Additionally,　dynamic　disulfide　bonds　were　specifically　introduced　into　the　SRCM　molecular　structure　to　further　enhance　its　dynamic　structure　repairing　performance.　Firstly,　SRCM　was　applied　to　modify　SMHVA　prepared　chemically　modified　SMHVA　(CSMHVA).　Infrared　spectroscopy　and　fluorescence　microscopy　revealed　that　the　high-temperature　conditions　during　SMHVA　preparation　triggered　the　terminal-NCO　reactive　compounds　released　from　SRCM,　facilitating　its　cross-linking　reactions　with　asphalt.　During　short-term　aging,　the　continuously　activated　SRCM　healed　the　degraded　SBS　molecular　structure　and　effectively　established　dynamic　cross-linking　networks,　thereby　achieving　self-enhancement　of　the　SBS　network,　making　the　SBS　cross-linking　network　main　chains　of　CSMHVA　almost　complete　after　aging.　Rotational　viscosity　tests　revealed　that　the　reaction　between　activated　SRCM　and　asphalt　produced　carbon　dioxide　bubbles　and　dynamic　covalent　structure,　which　lowered　the　optimal　mixing　and　compaction　temperatures　of　CSMHVA　by　8.1　°C　and　4.2　°C,　respectively.　Rheological　master　curve　analysis　indicated　that　adding　SRCM　improved　both　the　high　and　low-temperature　performance　of　SMHVA,　and　the　sustained　effect　of　SRCM　further　enhanced　the　high-frequency　(low-temperature)　performance　of　SMHVA　after　short-term　aging.　MSCR　tests　and　time　sweep　results　confirmed　that　SRCM　significantly　improved　high-temperature　rheological　performance,　and　the　dynamic　SBS　cross-linking　networks　formed　during　aging　decreased　CSMHVA＇s　aging　sensitivity.　The　results　can　provide　more　environmentally　friendly　material　options　for　the　asphalt　industry.　©　2024　Elsevier　Ltd