Building plastering maintenance device

The building plastering maintenance device comprises a spraying sleeve and a water tank, the spraying sleeve is of a hollow structure, extension assemblies used for increasing the spraying area are arranged at the two ends of the spraying sleeve, a plurality of spraying holes are formed in one side of the spraying sleeve at equal intervals, and the side, away from a spraying pipe, of the spraying sleeve communicates with a water supply pipe; the end, away from the spraying sleeve, of the water supply pipe is connected with a horizontal assembly through a connecting plate, the horizontal assembly is used for driving the connecting plate to reciprocate in the horizontal direction and arranged on the top of the water tank, and a conveying assembly is arranged in the water tank and used for supplying water into the water supply pipe. And a walking assembly for driving the water tank to walk on the ground is arranged at the bottom of the water tank, and the problem that in the prior art, when a plastered wall surf