Abstract: The cyclic tests are performed in order to compare the seismic behavior of two 1/6 scale composite core walls with different columns,one with concrete filled steel tube columns and the other with steel tube-reinforced concrete columns.Based on the experiment,load-carrying capacity,ductility,hysteretic property,stiffness and degradation,energy dissipation and damage characteristics of the two specimens are compared.It is shown that the seismic behavior of the core walls with steel tube-reinforced concrete columns is better than those with concrete filled steel tube columns.The mechanical model for calculating load-carrying capacity of the new RC composite core walls is proposed.And the calculating results agreed well with the results from the experiments.