In　order　to　make　energy　dissipation　technology　apply　to　the　actual　reinforcement　project　better.　In　this　paper,　the　common　type　of　energy　dissipation　devices　and　working　principle　at　home　and　abroad　are　summarized.　The　difference　between　traditional　seismic　technology　and　energy　dissipation　technology　is　briefly　introduced.　The　mechanics　theory　and　calculation　method　of　viscous　damper　are　described　in　detail.　By　adopting　Sap2000,　and　according　to　practical　engineering,　the　general　process　of　energy　dissipation　design　is　expounded,　and　the　conditions　of　structural　before　and　after　reinforcement　are　compared.　The　analysis　results　prove　that　earthquake　response　of　structure　is　effectively　reduced　on　adopting　energy　dissipation　technology,　and　so　the　engineering　reaches　the　requirements　of　the　seismic　code.