Owing　to　the　buckling　problem　of　corrugated　steel　webs,　up　to　now　the　span　of　prestressed　concrete　box　girder　bridges　with　corrugated　steel　webs　has　not　exceeded　200m.　Based　on　the　analysis　of　buckling　strength　of　corrugated　steel　webs,　a　new　type　of　large　span　prestressed　concrete　box　girder　bridge　with　double-limb　corrugated　steel　webs　is　proposed　in　this　paper.　It　reduces　the　free　height　of　the　corrugated　steel　webs　by　filling　core　concrete　between　the　double-limbed　corrugated　steel　webs,　and　increases　buckling　strength　of　the　webs.　Additionally,　the　optimization　technique　of　strong　top　plate　and　thin　bottom　plate　is　applied　to　reduce　the　self-weight　of　constant　load　without　reducing　the　cross-sectional　stiffness.　The　result　of　the　trial　design　shows　that　this　bridge　type　is　applicable　and　economical,　which　can　achieve　a　breakthrough　in　the　span　of　prestressed　concrete　box　girder　bridges　with　corrugated　steel　webs.　©　IABSE　Congress　Nanjing　2022　-　Bridges　and　Structures:　Connection,　Integration　and　Harmonisation,　Report.　All　rights　reserved.