Disclosed is a reinforced-bar concrete slab, which comprises a reinforced-bar concrete and a three-dimensional formwork, wherein the three-dimensional formwork is enclosed in the reinforced-bar concrete, the three-dimensional formwork comprise an upper top board (1), peripheral side panels (2) and a lower bottom (3), the upper top board (1), the peripheral side panels (2) and the lower bottom (3) are linked each other to form a polyhedral closed cavity (4), characterized that the three-dimensional formwork is equipped with a hook (37), a drawn wire (38), a hanging member (39), an embedded iron member (40), a sunk groove (41), a preformed hole (42), an embedded guide conduit (43), a wiring box (44), a water pipe (45), a ventilation pipe (46) or their combination. The invention can be applied to hollow concrete structures such as roofs, foundation floors, concrete walls and bridges, especially to project of hollow floor slabs. |