Building wall spraying device

The utility model discloses a building wall spraying device which comprises a base, a telescopic air cylinder is fixedly arranged on one side of the base, a spraying assembly is fixedly arranged at the output end of the telescopic air cylinder, the spraying assembly comprises a protection frame, a spraying plate is arranged in the protection frame in a sliding mode, a plurality of sets of spraying heads are fixed to one face of the spraying plate, and the spraying heads are fixed to the other face of the spraying plate. An adjusting threaded rod penetrating through the protection frame is fixedly arranged on the other face of the spraying plate. Compared with an existing spraying device, the spraying device for the building wall has the advantages that paint splashed during spraying is blocked through the protection frame, the paint is prevented from splashing, the workload of subsequent workers is reduced, and damage of the paint to the health of the workers is reduced; and meanwhile, air pressure generated