In　order　to　resolve　the　cracking　problem　of　reinforced　concrete(RC)link　slabs　used　in　simply-supported　girder　bridges　with　continuous　decks,　the　ultra-high　performance　concrete(UHPC)link　slab　with　high　tensile　strength　and　strong　crack　resistance　is　proposed　and　the　flexural　performance　of　the　UHPC　link　slab　is　studied.　The　experimental　tests　on　the　link　slab　specimens　under　bending　were　carried　out　to　compare　the　load-midspan　deflection　curves,　crack　propagation,　deflection　distribution　in　the　longitudinal　direction,　concrete　strain　and　reinforcement　strain　of　the　UHPC　and　RC　link　slabs.　The　key　design　parameters　of　the　UHPC　link　slab　were　analyzed　by　finite　element　method.　Based　on　the　measured　data,　the　method　to　calculate　the　maximum　crack　width　of　the　UHPC　link　slab　was　studied.　The　results　indicate　that　the　crack　resistance　and　flexural　stiffness　of　the　UHPC　link　slab　are　better　than　those　of　the　RC　link　slab.　The　utilization　of　UHPC　link　slab　can　lead　to　the　reduction　of　the　localized　flexural　strain　of　the　link　slab.　The　steel　fibers　in　the　UHPC　link　slab　can　restrict　the　crack　propagation　and　help　the　concrete　and　reinforcement　work　together.　The　thickness　of　the　UHPC　link　slab　and　the　debonding　layer　also　influence　the　ultimate　bending　moment　of　the　UHPC　link　slab,　either　increasing　the　thickness　of　link　slab　or　reducing　the　debonding　layer　thickness　can　improve　the　ultimate　bending　moment.　By　comparing　different　specifications　or　references,　it　is　concluded　that　to　calculate　the　bending-induced　maximum　crack　width　of　the　UHPC　slab,　the　method　to　calculate　the　maximum　crack　width　of　the　UHPC　link　slab　in　the　steel-UHPC　lightweight　composite　deck　is　also　an　alternative.　©　2022,　Journal　Press,　China　Railway　Bridge　Science　Research　Institute,　Ltd.　All　right　reserved.