Disclosed is a prefabricated hollow member for floor systems of spatial structure, which comprises an upper bottom (4), side panels (5), a lower bottom (6), and a reinforcement member (7), the upper bottom (4) and the side panel (5) enclose a formwork (9), the formwork (9) and the lower bottom (6) interconnect into a shuttering member with a closed cavity (8), the reinforcement member (7) is arranged in the cavity (8), characterized in that the reinforcement member (7) is provided with at least one hollow aperture (10) opening outward on the upper bottom (4) or/and side panels (5), the hollow aperture (10) is arranged on the intersecting position of the reinforcing ribs, the hollow aperture (10) is a vertical hollow one with reinforcement ribs crossing through it. |