Abstract: As the partⅡof analysis on seismic behavior of light composite structure,it is intended to direct seismic design of the structure,A model of light composite structure with ratio 1:2 is studied through the pseudo-dynamic and pseudo-static test and elasto-plastic earthquake response analysis with 3D finite element method with commercial software MARC.Test results of law of hysteresis loop,displacement response and base shear response of the model are analyzed and the analyzing results are compared with results of elasto- plastic earthquake response analysis.The analyzing and comparisons show that the analyzing results coincide with test results fairly,and elasto-plastic earthquake response analysis with finite element method can be used in seismic design of the structure.Because of the large rigidity and the short period of the structure,with the appearance and development of the crack,the rigidity of the structure will be gradually redaced,and the period of the structure will be gradually increased and close to predominant period of the site,and the resonance occurs.So when the large rigidity structure is designed,how to avoid the predominant period of the site is necessary.