Abstract: This paper introduces principle for calculating the netting structure of fiber -reinforced plastics composite.The filament-wound netting structure is used to make,shells reinforced with external,and internal nettings,core of the sandwich structure reinforced with the netting shell,and is effective to improve the load -bearing behaviour of shells under external and axial load.Two methods for calculating the filament-wound melting structure are presented.One is the non-incremental method,and the other is the incremental circumference equiadivision method.