This　study　investigated　the　flexural　performance　of　corrugated　top　flange　steel-concrete　composite　beams　in　the　negative　moment　region　by　tests　and　numerical　analysis.　A　total　of　three　static　loading　tests　were　conducted,　including　two　specimens　with　corrugated　top　flange　and　one　specimen　with　normal　top　flange.　Test　parameters　were　the　type　of　the　top　flange　and　the　longitudinal　reinforcement　ratio.　The　failure　mode,　crack　pattern,　and　capacity　of　the　specimens　were　discussed.　The　results　showed　that　the　failure　mode　of　all　three　specimens　was　flexural　failure.　The　capacity　and　ductility　increased　using　the　corrugated　top　flange,　and　the　improvement　in　crack　resistance　by　the　corrugated　top　flange　was　much　greater　than　reinforcement　ratio.　A　calculation　method　for　flexural　capacity　was　proposed　according　to　the　tests　and　analysis.　The　calculated　flexural　capacity　was　in　good　agreement　with　the　test　results　with　a　relative　error　of　less　than　10　%.　The　test　results　were　also　used　for　calibrate　numerical　models　for　further　parametric　study.　It　was　found　that　the　flexural　capacity　increased　with　increasing　corrugation　angle　or　decreasing　the　corrugation　height,　while　the　effect　of　corrugation　height　was　higher　on　the　structural　performance.　Data　availability:　Data　will　be　made　available　on　request　©　2024　Institution　of　Structural　Engineers