Wanxin　Bridge,　a　self-anchored　suspension　bridge　with　main　span　of　160m,　is　the　longest　one　among　the　concrete　self-anchored　suspension　bridges　in　the　world.　The　cables　were　made　of　a　continuous　galvanized　steel　rope　passing　over　all　saddles,　and　the　two　main　cables　form　a　closed　loop.　It　was　the　first　practice　of　looped　main　cable　in　China.　The　elastic　modulus　of　steel　rope　is　lower　than　that　of　the　parallel　wire　used　in　common　cases,　which　leads　the　stiffening　girder　deflection　to　be　larger　under　vehicle　load.　So,　rigidity　control　is　an　important　issue　in　the　design　of　the　bridge.　Thus,　the　reliability　analysis　for　stiffening　girder　deflection　of　the　bridge　is　carried　out　in　this　paper.　In　finite　element　(FE)　model　nonlinear　behaviors　of　the　structure　are　considered　including　main　cable＇s　geometric　nonlinearity　and　P-Delta　effect　of　the　tower　and　the　stiffening　girder.　The　results　show　that　the　reliability　of　stiffening　girder＇s　deflection　meets　the　requirement　of　object　reliability　index　and　the　bridge　is　rigid　enough　to　resist　the　vehicle　load.