High　durability　and　high　tensile　strength　makes　ultra-high　performance　concrete　(UHPC)　an　ideal　material　for　bridges,　while　its　early　shrinkage　in　the　construction　of　cast-in-situ　mass　concrete　leads　structure　crack-easily,　which　restricts　the　application　of　UHPC　in　deck　system.　Whether　reasonable　amount　of　coarse　aggregate　can　influence　the　strength　of　UHPC　and　improve　the　shrinkage　performance　or　reduce　the　cost　is　still　in　doubt.　Besides,　in　order　to　improve　its　constructability　and　workability,　whether　autoclaved　curing　system　of　UHPC　can　be　changed　remains　to　be　further　researched.　In　response　to　these　circumstances,　a　systematic　experimental　study　on　the　strength　of　UHPC　mixed　with　coarse　aggregate　in　different　ratios　has　been　presented　in　this　paper.　The　three　curing　systems,　namely　standard　curing,　180-200℃/1.1　MPa　autoclaved　curing,　and　hot　water　curing　were　tested　to　reveal　the　relationship　between　UHPC＇s　properties　and　curing　systems,　and　the　UHPC＇s　microstructure　was　also　preliminarily　studied　by　scanning　electron　microscope　(SEM).　The　experimental　research　can　draw　the　following　conclusions.　Under　the　condition　of　the　same　mix　ratio,　autoclaved　curing　guarantees　the　highest　compressive　strength,　followed　by　hot　water　curing　and　standard　curing.　The　compressive　strength　of　concrete　increases　with　the　temperature　in　the　range　of　25　to　90℃　hot　water　curing,　and　high　temperature　in　precuring　period　can　speed　up　the　strength　development　of　UHPC,　but　the　sequence　of　precuring　period　does　not　obviously　affect　the　results.　In　90℃　hot　water　and　autoclaved　curing,　the　strength　is　over　150　MPa,　and　it　has　little　relation　with　gravel　ratio.　While　the　value　increases　first　and　then　decreases　in　a　lower　temperature　curing　with　the　increasing　of　gravel　amount,　even　only　about　80　MPa　at　room　temperature.　The　strength　increases　moderately　along　with　the　increase　of　the　curing　age　by　standard　curing,　especially　in　the　initial　stage.　Copyright　©　2017　Editorial　Board　of　Journal　of　Donghua　University,　Shanghai,　China.