Waterproof vacuum disc convenient to limit

The utility model discloses a waterproof vacuum plate convenient to limit in the technical field of vacuum plates, which comprises a vacuum plate body, the surface of the vacuum plate body is movably connected with a cover body, the inner wall of the cover body is provided with a sliding groove, and the top of the vacuum plate body extends to the outside of the cover body through a telescopic vacuum pipe. A waterproof pad is fixedly connected to the bottom of the vacuum disc body, clamping blocks are welded to the two sides of the top of the vacuum disc body, first sliding blocks are fixedly connected to one sides of the clamping blocks, the other sides of the first sliding blocks extend into the sliding grooves and are slidably connected with the interiors of the sliding grooves, and movable blocks are fixedly connected to the other sides of the first sliding blocks; a sliding rod is slidably connected into the movable block, the two ends of the sliding rod are fixedly connected with the interiors of the sli