In　order　to　inhibit　asphalt　pavements　reflecting　crack,　increase　pavements　cycle　life,　prevent　rutting　and　decrease　water　damage,　application　research　of　four　kinds　of　geosynthetics　such　as　glass-fibre　geotextile,　polyester-fibre　geotextile,　big-hole　geogrid　and　small-hole　geogrid　used　in　asphalt　pavement　has　been　done.　The　experiments　include　double-courses　dynamic　stability　test,　refined　direct　shear　test,　tension　test　and　fatigue　test.　The　results　indicate　that　all　four　kinds　of　geosynthetics　can　improve　anti-rutting　capacity,　but　considering　construction　easiness　and　performance　stability,　geotextile　should　be　recommended　with　priority.　And　all　four　kinds　of　geosynthetics　can　effectively　inhibit　pavement　fatigue　crack　and　geotextile　works　better　than　geogrid.　From　qualitative　analysis　of　material　structure,　geotextiles　soaked　asphalt　can　play　the　role　of　waterproofing　membrane　and　effectively　reduce　the　infiltration　of　water.