In order to study the effect of cross-section stiffness of composite materials on the performance of concrete filled steel tubular columns under low cycle cyclic loading,three concrete filled steel tubular columns were tested under low cycle cyclic loading using concrete filled steel tubular columns in the second phase of Guoyuan Port Project as prototype.Physical model tests were carried out to study the effects of steel tube thickness on energy dissipation,bearing capacity,strength degradation,stiffness degradation,ductility and deformation capacity of concrete filled steel tubular columns.The experimental results show that the energy dissipation coefficient and the equivalent viscous damping coefficient of the specimens decrease with the increase of the thickness of the steel tube,and the energy dissipation capacity of the specimens decreases.The smaller the thickness of the steel tube is,the better the energy dissipation performance of the concrete filled steel tubular column specimens.The thicker the steel tube is,the stronger the restraint effect on core concrete,the weaker the strength degradation and the better the plastic deformation ability of the specimens.The thicker the steel pipe,the stronger the restraint effect of the outer steel pipe on the core concrete and the higher the horizontal bearing capacity.