This　paper　investigates　the　damage-healing　properties　of　unmodified　and　polymer　modified　asphalt　binders　under　different　aging　levels　using　newly　developed　linear　amplitude　sweep　based　healing　(LASH)　test.　One　neat　asphalt　70#　and　one　Styrene-Butadiene-Styrene　(SBS)　modified　asphalt　are　selected　in　this　study.　The　original　binders　are　subjected　to　the　Rolling　Thin　Film　Oven　(RTFO)　and　Pressurized　Aging　Vessel　(PAV)　tests　for　stimulating　the　short-　and　long-term　aging　of　asphalt　binders　during　the　pavement　construction　and　service　phases.　Through　the　LASH　tests　under　different　aging　levels　of　the　two　binders,　it　is　found　that　the　damage-healing　performance　of　both　neat　and　modified　asphalt　binders　gradually　decrease　with　the　increasing　aging　levels.　It　is　also　observed　that　the　healing　performance　of　70#　neat　asphalt　is　higher　than　that　of　SBS　binder　in　pre-failure　conditions,　however,　the　healing　behaviors　of　SBS　binder　is　becoming　obviously　better　than　that　of　70#　binder　after　fatigue　failure.　Furthermore,　a　promising　relationship　is　found　between　the　macroscale　healing　properties　of　asphalt　binders　and　their　microscale　chemical　composition　under　various　aging　levels.