Chinese　ancient　buildings　are　mainly　made　of　wood.For　thousands　of　years　they　have　experienced　sorts　of　earthquakes　but　remain　intact.In　this　paper,we　took　Ying-Hua　Palace　in　the　Forbidden　City　in　China　as　an　example.By　simulation　methods　we　carried　out　analysis　on　dynamic　character　as　well　as　aseismic　capacity　of　the　building.By　introducing　2-node　semi-rigid　spring　elements,we　simulated　tenon-mortise　joints　and　tou-kungs　which　are　members　of　Chinese　ancient　buildings　as　such　spring　elements.　Then　we　built　model　of　Ying-Hua　Palace.By　modal　analysis　we　studied　vibration　characters　of　the　building.By　analysis　of　response　spectrum　of　the　palace　we　obtained　displacement　as　well　as　inner　forces　of　the　structure.Results　show　that　basic　frequency　of　Ying-Hua　Palace　is　0.58Hz,whose　main　vibration　modes　are　of　translation;Under　rare　earthquake　of　magnitude　8　the　structure　remains　intact;On　the　other　hand,the　simulation　method　for　Chinese　ancient　buildings　is　effective.　©　2009　IEEE.