The invention provides a combined column formed by embedding round steel tubes filled with recycled concrete in a multiple-cavity steel pipe filled with concrete and provided with batten plates. The combined column comprises a polygonal steel pipe (1), an inner partition board (2), normal concrete (3), the round steel tubes (4), recycled concrete (5) and the batten plates (6), wherein the polygonal steel pipe is divided into multiple small cavities through the inner partition board; the restriction effect of steel plates on the core concrete is improved, so that the concrete is in a three-dimensional pressed state highly, therefore, the concrete strength is improved greatly, and the plasticity and toughness of the concrete are improved remarkably; meanwhile, due to the arrangement of the inner partition board, the stiffness, bearing capacity, ductility and seismic capacity of the whole component are improved to a certain extent; the round steel tubes have the stronger effect of a hoop, so that the influence on stress performance caused by degradation of recycled concrete material performance is reduced even eliminated, the application of the recycled concrete is popularized, and meanwhile, the structural performance is ensured; under the earthquake reciprocating effect, the earthquake energy is consumed through the mutual shearing of the batten plates and the concrete, so that the seismic performance is improved.