Spacecraft gridded composite bearing cylinder

The invention discloses a spacecraft gridded composited bearing cylinder, comprising an upper end frame, a lower end frame, a skin and a gridded rib, wherein the exterior of the gridded rib is wrapped with the skin to form an up-down through barrel, the upper edge and the lower edge of the barrel respectively comprise the upper end frame and the lower end frame; quantity of left rotating ribs and the quantity of right rotating ribs in the gridded rib are the same, and a prismatic grid is formed, wherein the rib angle is 30-45 degrees, and rib space is 80-150mm; the upper end frame and the lower end frame are formed by continuously flanging fibres of the skin and the gridded rib; and the upper end frame and the lower end frame respectively comprise a mounting interface for the bearing cylinder and a horizontal structural slab arranged outside. The spacecraft gridded composited bearing cylinder disclosed by the invention adopts a design form of skin+gridded rib composite bearing cylinder, structural mass is reduced by about 40% compared with an aluminium honeycomb interlayer bearing cylinder, important significance is realized during weight reduction of a satellite structure, and satellite platform bearing capacity is improved.