To　solve　the　issues　involved　in　the　inaccurate　evaluation　of　the　comprehensive　performance　of　in-service　asphalt　pavements　with　semi-rigid　base,　in　this　study,　extensive　investigation　and　field　testing　are　conducted　on　certain　asphalt　pavements　with　semi-rigid　base　in　Beijing.　A　total　of　over　1000　sets　of　FWD　data,　more　than　120　sets　of　radar　spectra,　and　138　cores　are　collected,　and　utilized　for　building　a　comprehensive　performance　evaluation　system　for　asphalt　pavements;　seven　indicators,　including　the　functional　and　structural　performances,　are　selected.　The　comprehensive　performance　of　the　pavement　is　analyzed　and　evaluated　by　principal　component　analysis　(PCA).　The　results　show　that　the　comprehensive　performance　evaluation　method　for　in-service　asphalt　pavements　with　semi-rigid　base,　proposed　in　this　paper　can　get　the　accurate　evaluation　including　the　total　score,　score　of　each　principal　component　and　ranking　of　each　pavement　section.　Furthermore,　the　comprehensive　performance　of　in-service　asphalt　pavements　with　semi-rigid　base　is　not　necessarily　related　to　the　highway　classification　and　road　age.　In　addition,　evaluation　method　for　in-service　asphalt　pavements　with　semi-rigid　base　proposed　in　this　paper　can　also　be　conducive　for　maintaining　and　utilizing　existing　road　structures;　thereby,　major　and　medium　rehabilitation　can　be　considerably　reduced,　supporting　green　and　scientific　road　maintenance.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.