The utility model discloses a combined bridge deck slab. The combined bridge deck slab comprises a core plate. Wherein the core plate comprises an upper panel, a lower panel and a plurality of pipe bodies arranged between the upper panel and the lower panel; the top end of the pipe body is fixed to the lower surface of the upper panel, and the bottom end of the pipe body is fixed to the upper surface of the lower panel. Wherein an RPC layer or a grid layer is arranged on an upper panel of the core plate, and a bridge floor surface layer is arranged on the upper surface of the RPC layer or thegrid layer; and an anti-falling structure fixed on the upper panel is arranged between the upper panel and the RPC layer, or the upper panel is fixedly connected with the bottom end of the grid layer.The anti-fatigue strength of the bridge deck slab is improved, and the service life of the bridge deck slab is prolonged.