Drainage pipeline connecting structure for high-rise building construction

The utility model relates to the technical field of pipeline connection, and discloses a drainage pipeline connecting structure for high-rise building construction. The device comprises an outer pipe body, a fixing plate is welded in the outer pipe body, a hole is formed in the fixing plate, an inner pipe body is prevented from being welded in the hole of the fixing plate, a clamping groove is formed in the inner wall of the outer pipe body, an arc-shaped limiting plate is slidably connected to the inner surface of the clamping groove of the outer pipe body, and a threaded hole is formed in the outer surface of the outer pipe body; a fastening screw is in threaded connection with the interior of the outer pipe body, an external thread of the fastening screw penetrates through the outer pipe body and is connected to the interior of the arc-shaped limiting plate, drainage pipes are detachably connected to the outer surface of the inner pipe body, fixing circular rings are welded to the outer surfaces of the dra