On the base of date analysis of a great lot tests at home and abroad,the simplified formulas of bearing capacity for short concrete-filled steel tubular(CFST) columns subjected to axial compression are derived.In addition,the simplified formula for the stability bearing capacity of slender CFST columns is deduced.The theoretical results agree with those of tests well.The physical concept of those formulas is definitude.The formula can be used as a reference for the design of engineering.