In　order　to　make　scientific　treatment　strategies　for　existing　asphalt　pavement　with　semi-rigid　base　course,　a　pavement　structure　analysis　model　was　established　by　using　the　Abaqus　software.　Influence　of　pavement　parameters　on　fatigue　life　of　semi-rigid　sub-base　was　analyzed.　The　calculation　results　were　verified　by　the　actual　data　of　the　typical　sections　of　expressway　in　Beijing.　And　treatment　strategies　for　existing　asphalt　pavement　with　semi-rigid　base　course　were　put　forward.　The　results　show　that　the　effect　of　base　thickness,　sub-base　thickness,　asphalt　layers　thickness　and　traffic　load　on　the　fatigue　life　of　semi-rigid　base　materials　are　more　obvious　than　that　of　sub-grade　modulus　and　sub-base　modulus.　The　effect　of　asphalt　layers　modulus　and　base　layers　modulus　are　relatively　small.　The　practical　application　of　the　expressway　also　shows　that　the　relationship　between　asphalt　pavement　overhaul　period　of　the　first　time　and　the　thickness　of　asphalt　pavement　is　more　significant　than　that　of　the　total　thickness　of　the　pavement　structure.　The　asphalt　pavement　with　thicker　asphalt　pavement　has　a　longer　service　life.　The　decline　of　material　modulus　does　not　affect　the　durability　of　the　pavement　structure　and　the　existing　structure　of　asphalt　pavement　with　semi-rigid　base　course　still　have　durability　and　the　service　life　of　pavement　can　be　prolonged　under　the　condition　that　there　is　not　any　comprehensive　renovation.　©　2017,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.