Abstract: In order to further study the seismic behavior of reinforced concrete core wall and factors influencing,two reinforced concrete core wall models with large height-width ratio were built and tested to failure under the combined action of constant axial load and reversed cyclic lateral load.The axial compression ratio on each core wall was different.This paper presents the results,including failure mode,hysteretic behavior,load-carrying capacity,ductility,energy dissipation ability,shear lag effect.The final overall bending damage occurred at the bottom of each model.With the axial compression ratio increasing from 0.2 to 0.5,stiffness and load-carrying capacity of the specimen had risen markedly,but the ductility performance dropped significantly.It can be seen from the analysis that the axial compression ratio having important effect on the seismic behavior of reinforced concrete core wall.