In order to improve the bearing capacity and ductility of square concrete-filled steel tube (CFST) column，this paper proposed a new structure scheme，adding ribs at the end of CFST column.Three CFST columns with end ribs were designed and produced.Pseudo static test was conducted，and seismic behaviors including the bearing capacity，hysteresis curves，skeleton curves and displacement ductility were obtained.Compared with the conventional CFT columns，experimental results indicated that the hysteretic loop curve of the test specimens dissipated large energy，and the decline of the skeleton curve was not significant.The ultimate displacement increased obviously by 44.4%，65.3% and 29.3%，respectively.The ductility increased by 27.0%，51.3% and 6.7%，respectively.The CFST columns with ribs exhibited good energy dissipation capacity and their seismic performance was significantly improved with larger ductility.