Compared　to　RC　(Reinforced　Concrete)　utility　tunnel,　Ultra-High　Performance　Concrete　(UHPC)　utility　tunnel　can　reduce　structural　slab　thickness,　allow　for　larger　usable　space,　and　improve　the　durability　and　service　life.　To　compare　the　damage　mechanisms　and　damage　modes　of　two　kindes　of　utility　tunnels,　as　well　as　the　cracking　load,　stiffness,　ultimate　bearing　capacity　and　joint　opening　under,　the　mechanical　performance　test　of　the　prestressing　tendon　connected　UHPC　utility　tunnel　and　RC　utility　tunnel　under　the　static　force　was　carried　out.　The　effect　of　prestressing　degree　on　the　longitudinal　stiffness　of　the　UHPC　utility　tunnel　was　analyzed　by　finite　element　model,　and　the　stiffness　calculation　method　was　also　to　be　explored.The　results　show　that　compared　with　RC　utility　tunnel,　the　cracking　load,　yield　load　and　ultimate　load　of　UHPC　utility　tunnel　increase　by　84%,　36%　and　45.　5%　respectively.　And　the　bending　stiffness　of　UHPC　utility　tunnel　have　is　larger　than　that　of　RC　utility　tunnel.　When　reaching　the　ultimate　load,　the　vertical　misalignment　of　the　UHPC　utility　tunnel　joint　is　38%　smaller　than　that　of　the　RC　utility　tunnel,　indicating　that　the　mechanical　performance　of　UHPC　utility　tunnel　joints　is　better　than　that　of　RC　utility　tunnel.The　rigid　calculation　formal　of　the　joints　can　provide　a　basis　for　the　design　calculation　of　UHPC　utility　tunnel.　©　2025　Editorial　Board　of　Journal　of　Basic　Science　and　Engineering.　All　rights　reserved.