Abstract: In order to study on the effects on seismic property of foam-in-place cavity wall acted upon different vertical pressure,the model tests and numerical tests of the in-plane seismic property and out-of-plane seismic property of foam-in-place cavity wall and solid wall were carried out.The comparison analysis of the model tests and numerical tests shows that the failure patterns,carrying capacity,deformation ability and coordination deformation ability of the numerical tests of foam-in-place cavity wall are agree with the data of model tests,and the validity and accuracy of the numerical tests are verified.The numerical tests of the in-plane and out-of-plane seismic property of the foam-in-place cavity wall acted upon different vertical pressures are carried out.In general,vertical pressure makes a greater effect on out-of-plane seismic property than in-plane seismic property.The seismic carrying capacity,displacement and relative displacement difference of the in-plane and out-of-plane foam-in-place cavity wall will increase and coordination deformation capacity will reduce when vertical pressure increases.The influence of vertical pressure on coordination deformation capacity of foam-in-place cavity wall is obvious.The coordination deformation capacity will reduce remarkably when vertical pressure is greater than 0.5 MPa.It is therefore recommended that vertical pressure is not appropriate to be greater than 0.5 MPa when the foam-in-place cavity wall with great cavity thickness or in the buildings of high earthquake intensity regions.