Reverse slope drainage device for tunnel construction

The utility model discloses a reverse slope drainage device for tunnel construction, which belongs to the technical field of drainage devices and comprises a drainage pipe and a filtering and cleaning mechanism, a water inlet and a water outlet are respectively arranged at two ends of the drainage pipe, a plurality of grooves are arranged on the outer surface of the drainage pipe, and the filtering and cleaning mechanism comprises two fixing plates. Each fixing plate is fixedly connected to the inner surface wall, close to the water outlet, of the water drainage pipe, the cleaning ring is movably embedded in the water drainage pipe, the pull rods on the fixing plates support the cleaning ring, water entering from the water inlet can be filtered through the filter screen plates on the cleaning ring, and the water quality of drainage in reverse slope tunnel construction is improved; the pull rod conveniently drives the cleaning ring to move in the drainage pipe, the slope on the cleaning ring conveniently scrap