Low-temperature　cracking　is　common　distress　in　asphalt　pavements.　Understanding　the　change　rule　of　its　low-temperature　properties　is　helpful　in　investigating　the　optimal　maintenance　timing　of　asphalt　pavement.　In　this　paper,　the　change　rule　of　low-temperature　properties　of　asphalt　binders　with　aging　time　is　investigated　by　various　indexes.　Four　asphalt　binders　and　four　anti-aging　modified　asphalt　binders　were　subjected　to　the　rolling　thin　film　oven　(RTFO)　test　and　pressure　aging　vessel　(PAV)　test.　Dynamic　Shear　Rheometer　(DSR)　with　the　4　mm　parallel　plates　was　used　to　determine　the　low-temperature　properties　of　asphalt　binders.　The　results　show　that　aging　and　low　temperature　have　a　negative　impact　on　the　low-temperature　properties　of　asphalt　binders.　The　anti-aging　agent　improves　the　low-temperature　properties　and　aging　resistance　of　asphalt　binders.　Compared　with　other　indexes,　the　critical　cracking　temperature　Tc　and　the　critical　temperature　difference　Delta　Tc　are　more　suitable　for　analysing　the　effect　of　aging　on　the　low-temperature　properties　of　asphalt　binders.　Also,　the　Delta　Tc　shows　the　three-stage　decreasing　rule　of　＇fast-slow-fast＇,　with　the　inflection　points.　It　meant　that　the　low-temperature　properties　of　asphalt　binders　had　been　altered　at　the　inflection　points,　which　provided　a　favourable　reference　to　research　on　the　optimal　maintenance　timing　of　asphalt　pavement.