In　this　paper,　a　series　of　enzymatic　hydrolysis　lignin　modified　petroleum　asphalts　were　prepared.　The　physical　properties　such　as　softening　point,　ductility　at　low　temperature　and　penetration　of　the　modified　asphalt　were　investigated.　The　penetration　index　of　asphalt　modified　with　EHL　was　higher　than　that　of　unmodified　asphalt,　equivalent　softening　point　increased　and　equivalent　brittle　point　decreased　with　the　increase　of　EHL　amount,　which　showed　that　the　addition　of　EHL　was　favorable　to　reduce　the　temperature　susceptivity　of　asphalt.　When　the　EHL　was　4%,　the　ductility　was　39.0　cm.　Meanwhile,　low　temperature　performance　of　asphalt　could　be　further　improved　by　adding　EHL　and　a　small　amount　of　SBS.