Hidden water tank in closestool cabinet

The utility model discloses a hidden water tank in a closestool cabinet. The water tank comprises a water tank body, a water tank cover plate and button assemblies. Edge buckling strips are fixedly installed on the periphery of an opening in the top of the water tank body, a water tank cover plate is connected to the outer surfaces of the edge buckling strips in a clamped mode, fixing elastic buckles are fixedly installed on the left side and the right side of the top of the inner surface of the water tank cover plate, and buckling grooves are formed in the two sides of the bottom of the watertank cover plate. The hidden water tank in the closestool cabinet is beneficial to decorating the appearance, easily meets the requirements of disassembly, assembly, movement and the like, is suitable for being installed in various types of cabinet bodies, improves the space pattern, and increases the design aesthetic feeling; the movably designed water tank cover plate is fixed by the upper buckling groove and the lower