To　improve　the　mechanical　performance　and　economy　of　traditional　U-shaped　damper,　and　solve　the　problems　of　low　initial　stiffness　and　limited　bearing　capacity,　a　novel　U-shaped　damper　with　corrugated　energy-consuming　component　(UDCEC)　was　proposed.　To　clarify　the　working　mechanism　and　mechanical　performance　of　UDCEC,　and　propose　a　design　method　for　the　bearing　capacity　and　stiffness　of　UDCEC,　the　influence　of　the　key　size　parameters　of　UDCEC　on　its　bearing　capacity　and　seismic　performance　was　analyzed　through　ANSYS.　Based　on　the　principle　of　virtual　work,　design　theoretical　formulas　for　the　bearing　capacity　and　stiffness　of　UDCEC　were　derived,　and　the　accuracy　of　theoretical　formulas　was　verified　through　finite　element　simulation.　The　results　show　that　the　stiffness,　energy　dissipation　capacity,　and　economy　of　UDCEC　is　significantly　improved　compared　to　traditional　U-shaped　damper.　The　influence　of　the　size　parameters　of　corrugated　plate　on　seismic　performance　of　UDCEC　is　larger　than　that　of　U-shaped　plate.　Increasing　the　thickness　of　the　corrugated　plate　can　effectively　avoid　shear　buckling　of　the　corrugated　plate,　thereby　improving　the　bearing　capacity　and　energy　dissipation　capacity　of　the　UDCEC.　The　design　theory　has　high　accuracy　and　can　provide　a　theoretical　basis　for　the　engineering　application　of　UDCEC.