A　low　tower　cable-stayed　bridge　with　a　span　of　30m+60m+120m+60m+30m　had　been　built　before　Guidelines　for　Seismic　Design　of　Highway　Bridge　was　promulgated.　Because　of　its　importance　and　specificity,　it　is　necessary　to　do　research　on　seismic　performance　of　this　bridge.　According　to　the　numerical　analysis,　it　is　found　that　the　structural　response　exceeds　the　allowance　and　the　bridge　might　be　destroyed　if　earthquake　happened.　Here,　energy　dissipated　technology　is　chosen　to　cope　with　this　problem.　But　traditional　lead　shear　damper　hasn＇t　the　capabilities　of　large　deformation　for　some　reason　and　can　not　be　applied　to　bridge　engineering　in　general　case.　In　this　article,　a　new　type　of　lead　shear　damper　with　capabilities　of　large　deformation　is　used　to　achieve　energy　dissipation.　Through　comparing,　it　is　found　that　the　damping　effect　of　this　new　damper　is　as　good　as　that　of　viscous　damper.　And　the　damper　has　no　problem　with　leakage　and　metamorphism.　What＇s　more,　it　is　much　cheaper　than　viscous　damper.　So,　lead　shear　damper　has　a　good　prospect　in　bridge　damping.