The invention discloses a novel plugging tool for a pipeline reserved hole. The novel plugging tool for the pipeline reserved hole comprises a base, a fixing hole, a butt-joint pipe, a first fixing rod, a second fixing rod, a block blade, a threaded rod, a first nut, a fixing pin, a second nut, a supporting foot, a first buckling-joint area and a second buckling-joint area. One end of the butt-joint pipe is welded to the side surface of the inner side of the base. One end of the supporting foot is welded to the side surface of the outer side of the butt-joint pipe. The other end of the supporting foot is welded to the surface of the base. The side surface of the outer side of the second fixing rod is welded to the block blade. The first fixing rod is provided with an opening hole, and one end of the threaded rod penetrates through the opening hole and stretches into the first fixing rod and is fixed through the first nut. One end of the fixing pin is welded to the surface of the outer side of the threaded rod, and the second nut is connected with the fixing pin in a threaded mode. The base is provided with the fixing hole. According to the novel plugging tool for the pipeline reserved hole, the plugging procedure is optimized, the construction time is shortened, the construction efficiency is improved, the plugging effect is good, the technology is beautiful, once molding is achieved, and polishing is not needed.