Waste　cooking　oil　has　surfaced　as　a　hazardous　waste　that　induces　severe　environmental　contamination.　Encapsulation　technology　presents　a　viable　solution　to　regenerate　the　waste　oil　and　augment　the　self-healing　ability　of　asphalt　materials.　This　study　characterized　capsules　synthesized　with　selected　waste　oil　for　selfhealing　asphalt　mixture,　and　evaluated　the　self-healing　and　environmental　impact.　The　wetting　ability,　capillary,　anti-aging,　and　self-healing　performance　of　three　potential　healing　agents　were　analyzed,　and　the　optimal　healing　agent　was　obtained　by　evaluating　the　comprehensive　behavior　with　the　radar　chart　method.　Capsules　were　synthesized　using　the　ionic　gelation　method,　and　their　thermal　stability,　chemical　structure,　mechanical　performance,　and　morphology　were　characterized.　Fatigue-healing　performance　asphalt　mixture　with　capsules　were　investigated　by　indirect　tensile　fatigue　test　with　intermittent　time.　Leakage　of　waste　oil　core　were　measure　to　verify　it　environmental　impact　to　surroundings.　Results　showed　that　all　healing　agents　could　restore　the　aged　asphalt,　and　waste　rapeseed　oil　had　superior　overall　performance　with　comprehensive　f　i　value　of　0.993　in　radar　chart　evaluation.　The　compression　characteristic　of　the　capsules　could　transform　from　brittleness　to　plasticity　as　the　water-to-oil(WO)　ratio　decreases　from　15　to　5.　SEM　observation　implied　when　the　WO　ratio　varied　from　10　to　15,　the　multi-pore　structure　of　capsules　could　be　appropriately　filled.　The　addition　of　capsules　in　the　mixture　increased　the　fatigue　life　extension　rate　(HD　f　)　of　aged　mixtures　(with　intermittent　time　0.1　s-0.8　s)　by　10-30%.　Leakage　of　waste　oil　from　the　mixture　was　inhibited,　substantially　reducing　38%　release　of　waste　oil.　This　can　serve　as　a　means　for　the　sustainable　utilization　of　waste　oil,　thereby　mitigating　environmental　pollution　and　negative　effects　caused　by　waste　oil.