The invention discloses a structure and a manufacturing process of a low-cost
carbon fiber composite material
sky railway
train body, and belongs to the technical field of application of composite materials on rail vehicles. The structure comprises a
train body side wall, wherein end walls are assembled and connected to the both ends of the
train body side wall; a top frame and a bottom frame arecorrespondingly assembled and connected to the inner top surface and the inner bottom surface of the train body side wall, a ceiling is assembled and connected to the outer top surface of the train body side wall, and a
bogie mounting hole is formed in the ceiling; the train body side wall and the end walls both comprise reinforced rib frames, inner skins and outer skins, and grids of the reinforcing rib frames are filled with sandwich foam blocks; the ceiling comprises a
sandwich panel, an upper
skin and a lower
skin, and the top frame, the bottom frame, the reinforcing rib frame, the inner skins, the outer skins, the upper
skin and the lower skin are all integrally molded from
carbon fiber composite materials; and the inner portions of the reinforcing rib frames are filled with sandwichfoam, and the purpose of satisfying the function and structure of the
load bearing mode of a suspension-type train body on the premise of light weight of the train body is achieved.