Using　recycled　oils　and　chemical　stabilizers　as　the　additives　in　high-viscosity　modified　asphalt　(HVMA)　is　being　developed　as　a　sustainable　way　to　solve　the　severe　segregation　problems　due　to　the　large　differences　in　nature　between　high-content　styrene-butadienestyrene　(SBS)　and　base　asphalt.　This　paper　attempts　to　use　three　recy-　cled　oils,　namely　castor　oil　(CO),　waste　cooking　oil　(WCO)　and　recycled　engine　oil　(REO),　as　compatibilizers　in　combination　with　different　chemical　stabilizers　(polyphosphoric　acid,　PPA;　sulfur)　to　investigate　their　amelio-　rative　roles　on　HVMA　segregation　problems.　By　means　of　the　gel　permeation　chromatography,　dynamic　shear　rheometer　and　fluorescence　microscopy,　the　chemo-rheological　properties　and　morphological　structures　of　HVMA　are　investigated,　as　well　as　their　storage　stability.　Results　show　that　the　recycled　oils　are　more　favorable　to　improve　the　high-temperature　rheological　performance　of　HVMA　than　aromatic　oil　(AO)　by　comprehensively　considering　the　softening　point,　zero-shear　viscosity,　elastic　recovery　percent　and　large　molecule　percentage,　and　the　role　ranking　is:　REO　＞　WCO　＞　CO　＞　AO.　Compared　with　the　addition　of　PPA　or　sulfur　alone,　when　PPA　and　sulfur　are　added　together,　the　rheological　performance　of　HVMA　is　promoted　most　significantly,　because　of　the　synergistic　cross-linking　reaction　of　these　chemical　stabilizers　with　asphalt　and　polymers.　Furthermore,　the　synergistic　effect　of　PPA　and　sulfur　markedly　reduces　the　temperature　sensitivity　of　HVMA.　However,　the　cigar　tube　test　reflects　that　adding　recycled　oils　as　compatibilizers　alone　can　not　improve　the　storage　stability　of　HVMA,　and　CO　and　WCO　even　aggravate　its　segregation.　Notably,　adding　REO　and　chemical　stabilizers　can　markedly　improve　the　storage　stability　of　HVMA,　and　the　effect　is　most　obvious　when　REO,　PPA　and　sulfur　are　added　together.