The preparation of steel tube-confined concrete with high early-strength and micro expansion by using sulphoaluminate cement was carried out.Properties of sulphoaluminate cement concrete such as high early-strength and micro expansion performance were analyzed through orthogonal design and the ultimate load-bearing capacity of concrete-filled steel tube was studied.The result show that the concrete with high early-strength and micro expansion can be prepared when m(Al_2O_3)/m(SO_3) in sulphoaluminate cement is 1.2 and the ultimate load-bearing capacity of steel tube cast with this kind concrete is higher than that of steel tube cast with normal expansive concrete with the same strength grade.