Abstract: Axial compression test of the composites adapter skirt integrally manufactured by VARTM was designed and conducted. The relationships between the axial strain and the hoop strain with the axial compression load were tested and analyzed, and the apparent structural stiffness of the skirt was characterized. The experimental results show that under the applied loading of 625.7kN the strain of the skirt is less than 0.5% and distributions of the strain are uniform in the skirt, and the apparent structural stiffness of the integral skirt reaches 40.9GPa.