The　method　of　CFRP　plate　reinforcement　for　the　rigid　joints　with　complete　welding　was　studied　using　finite-element　analysis.　Three　models　were　adopted　in　analyzed　software　ANSYS　and　they　are　Solid45,　Combin14　and　Shel1181,　which　used　to　simulate　steel,　glue　and　CFRP　plate　respectively.　The　results　show　that　the　ultimate　bearing　capacity　of　rigid　joints　improves　significantly　after　using　CFRP　reinforcement　for　joints.　And　the　results　also　show　that　the　level　of　improvement　is　relative　to　the　length,　width　and　thickness　of　CFRP　plates.