Experiments and analysis were carried out for the axial compression performance of reinforcement concretefilled tubular steel(CFTS). The deformation capacity and ultimate load capacity were investigated with the analysis of loadbearing behavior, deformation capacity and failure modes of the reinforcement CFT short columns. And the influence of reinforcement on the deformation and ultimate load capacity were analysed as well. Finally, the calculation method for axial bearing capacity of reinforcement CFT short column was discussed and a simplified calculation formula was proposed. It was indicated that the columns’ failure modes were changed and their ultimate load capacity and deformation performance were improved by reinforcement.