Disclosed is a cast-in-situs concrete hollow slab, which comprises a reinforced-bar concrete (1) and hollow shuttering members (2), the hollow shuttering member (2) are enclosed in the reinforced-bar concrete (1), the hollow shuttering members (2) are arranged alternatively, a cast-in-situ reinforced-bar concrete rib (3) is arranged between them, the hollow shuttering members (2) comprise an upper board (4), peripheral side panels (5), and a lower bottom (6), the upper board (4), the peripheral side panels (5), and the lower bottom (6) enclose a polyhedral hollow shuttering member (2), the upper board (4), the peripheral side panels (5), and the lower bottom (6) is provided with reinforcement article (7), characterized in that at least one of the upper board (4), the peripheral side panels (5), and the lower bottom (6) is provided with reinforced article (7) extended into another and anchored therein. Furthermore, the hollow shuttering members (2) are provided with at least a recess (8), the cast-in-situ concrete forms a cast-in-situ concrete reinforced structure (9) in the recess (8). The invention can be applied to cast-in-situ reinforced concrete or prestressed reinforcement concrete's hollow storied-building roofings, house roofings, walls, foundation bedplates and hollow bridges.