This paper calculates the stability of crossbar densely ribbed composite shell with big openings at the combined high axial and external load using finite element method. The critical load of column shell with big openings, different lay-up layers and loading is obtained.The calculated value is compared with the test results of full size piece. This paper also studies the filament winding process of the shell and implements one step processing by local reinforcement technology around the openings and the p...