The integral manufacturing for composites adapter skirt used for solid rocket motor is very beneficial to lighter weight and higher properties of the skirt. The integral composites adapter skirt was designed and made by RTM process, and the axial compression test of the skirt was conducted. The experimental results show that under the effect of the design loading, the strain of the skirt is less than 0.5%, and the structural stiffness of the skirt reaches 40.9GPa.