Large-area basement roof drainage device

The large-area basement roof drainage device comprises a supporting piece, a drainage body and a filtering mechanism, the drainage body is arranged to be of a conical cavity structure, the two ends of the drainage body are provided with a first opening and a second opening respectively, the caliber of the second opening is smaller than that of the first opening, and the filtering mechanism is arranged on the supporting piece. The first opening, the second opening and the filtering mechanism are coaxially arranged, the first opening is fixedly connected with the supporting piece, the filtering mechanism is connected with the first opening, and the second opening is connected with a water conveying pipeline. According to the utility model, rainwater is collected and reused, so that not only is the rainwater prevented from polluting the construction environment, but also water resources are saved, the construction cost is reduced, and the safety and integrity of a building structure are protected. 本实用新型公开了一种大面积地