The　extensive　development　of　energy　routers　(ER)　provides　new　solutions　for　urban　rail　transit　power　supply　systems　(URTPSS).　This　paper　proposes　an　innovative　urban　rail　transit　power　supply　system　based　on　ER,　featuring　a　fully　direct　current　(DC)　configuration　with　five　dedicated　ports　and　offering　high　flexibility.　The　system　supports　a　dual　energy　storage　solution,　batteries　and　supercapacitors　(SC),　to　effectively　manage　energy　demand　and　capture　braking　energy　from　trains,　achieving　an　energy　recovery　efficiency　of　88　%　during　braking.　Additionally,　a　photovoltaic　system　is　incorporated　to　promote　the　use　of　renewable　energy.　The　ER　is　designed　to　operate　in　conjunction　with　existing　infrastructure,　ensuring　a　continuous　power　supply　even　under　low　energy　storage　conditions,　while　maintaining　DC　bus　voltage　fluctuation　within　12.5　%　during　dynamic　operations.　The　URTPSS-ER　system　introduces　a　multi-level　cascaded　bidirectional　Buck-Boost　converter　to　stabilize　the　DC　bus　voltage　and　employs　fuzzy　control　(FZC)　for　dynamic　power　management　between　storage　components.　Two　operational　modes　are　defined　based　on　the　state　of　charge　of　the　storage　system　to　optimize　energy　usage.　Hardware-in-the-loop　(HIL)　experimental　results　demonstrate　the　effectiveness　of　the　proposed　system　and　control　strategy,　confirming　that　URTPSS-ER　can　improve　energy　utilization　efficiency　by　15.2　%　compared　to　conventional　systems,　making　it　a　viable　solution　for　sustainable　and　efficient　urban　rail　transit　power　management.