In　order　to　assess　the　strengthening　effect　of　U-shaped　steel-bonded　reinforcement　measure,　the　dynamic　and　static　performance　of　a　reinforced　concrete　T　girder　bridge　was　analyzed　before　and　after　strengthening　in　this　paper.　The　total　length　of　the　bridge　is　304.4　meter　long　and　the　T　shaped　main　beam　is　1.5　meter　high.　A　large　amount　of　cracks　were　found　in　main　girders　and　concrete　strength　also　couldn＇t　meet　the　design　requirement.　Therefore,　the　bridge　was　reinforced　by　a　variety　of　U-shaped　steel　plates.　The　dynamic　and　static　characteristics　were　obtained　by　ambient　vibration　test,　field　static　test　and　corresponding　finite　element　analysis.　The　results　show　that　the　maximum　vertical　frequency　of　the　bridge　increases　by　16.5%,　the　maximum　deflection　reduces　by　20.0%,　the　strain　reduces　in　range　from　18.1%　to　42.2%.　The　transverse　distribution　of　strain　is　more　stable　and　the　effect　of　U-shaped　steel-bonded　reinforcement　for　the　bridge　is　excellent.