Aimed　at　the　problem　that　the　modal　frequency　of　large　span　continuous　pre-stressed　rigid　frame　bridge　is　always　influenced　by　environmental　temperature,　a　statistical　analysis　with　modal　frequency　and　temperature　is　performed　on　the　Xiabaishi　bridge＇s　health　monitoring　data.　The　ternary　linear　regression　model　between　the　environmental　temperature　and　the　modal　frequency　of　this　bridge　is　proposed,　which　has　been　verified　to　show　a　relatively　high　precision　in　fitting　and　prediction.　And　it　can　be　used　to　predict　and　evaluate　modal　frequency　data　in　the　future.　Furthermore,　the　temperature　correctional　model　about　modal　frequency　of　Xiabaishi　continuous　rigid-framed　bridge　is　presented.　The　model　can　effectively　eliminate　the　effect　of　environmental　temperature　on　the　modal　frequency,　and　make　the　frequency　tend　to　be　stabilized.　It　can　provide　temperature　correction　modal　frequency　data　for　the　bridge　health　monitoring　analyses,　such　as　safety　and　durability　evaluation,　damage　detection,　updated　finite　element　model,　etc.