Waterproof paint coating device for pipeline

The invention belongs to the technical field of waterproof paint, and particularly relates to a pipeline waterproof paint coating device which comprises a pipeline body. A handheld rod is arranged at one end of the pipeline body; the end, close to the pipeline body, of the handheld rod is fixedly connected with a coating tank. Waterproof paint is arranged in the paint tank; a plurality of first sliding grooves are formed in the side wall of the coating tank. Waterproof paint can permeate into the side wall of the first sliding groove; the end part of the coating tank is rotationally connected with a plurality of groups of first rotating shafts; a rubber plate is fixedly connected to the side wall of the first rotating shaft. The rubber plate moves in the first sliding groove. The coating tank can be driven to move in the pipeline body by utilizing the portability of the handheld rod, so that the inner side wall of the pipeline body is coated by a rubber plate, the interior of the narrow pipeline body can be q