Bending　tests　on　full-scaled　steel-ultra-high　performance　concrete　(UHPC)　composite　beams　are　rarely　reported.　To　explore　the　bending　performance　of　steel-UHPC　continuous　composite　beam　while　verifying　the　reliability　of　short　bolts,　full-scale　bending　test　was　conducted.　Main　achievements　are　as　follows:　(1)　The　failure　process　of　the　steel-UHPC　composite　beam　can　be　divided　into　three　stages:　linear　elastic　working　stage　(ends　in　internal　force　redistribution),　elastoplastic　working　stage　(pass　through　serviceability　limit　state),　and　plastic　failure　stage.　(2)　The　failure　modes　of　steel-UHPC　composite　beams　are:　steel　beam　yields,　UHPC　around　the　middle　support　damaged　and　shows　a　number　of　short　fine　cracks　on　it,　and　longitudinal　steel　bar　reaches　tensile　strength.　(3)　Short　bolts　can　persistently　anchor　steel　beams　and　UHPC　in　the　whole　failure　process.　(4)　Both　edges　of　the　composite　beam　are　weaker,　and　the　connection　here　is　easier　to　be　destroyed,　forming　higher　strain,　larger　slip,　earlier　interface　separation,　and　more　cracks.　(5)　A　feasible　method　for　calculating　the　ultimate　bending　moment　bearing　capacity　is　given.