Abstract: The collapsible tube semi-sheet with the different plies composite "Ω" figuration part was manufactured by the method of vacuum-oven cured using carbon fibre reinforced plastics (CFRP,T300/5228) composite as ultra-thin unidirectional prepreg with 0.04mm ply thickness,and was analyzed by ANSYS software of finite element analysis.The effects of ply mode and the deviation of orientation angle on deformation were studied.Four ply mode parts were manufactured,and the deformation measurements are consistent with the numerical simulation analysis results.The ply mode of less effect on the deformation was obtained.The research show that ±45°plies affecte on deformation more than that of 0°ply,and 90°plies addition can control ply orientation deformation,which can partly control collapsible tube semi-sheet deformation.The CFRP composite collapsible tube semi-sheet deformation can be controlled to a certain extent by stacking sequence design.