Building wall coating auxiliary mechanism

The invention discloses a building wall coating auxiliary mechanism. The building wall coating auxiliary mechanism comprises a supporting mechanism, a brushing mechanism, a first height adjusting mechanism and a second height adjusting mechanism. The wall painting device is simple in structure, compact in design and convenient to use, a painting roller can synchronously rotate with a second servo motor by arranging a belt, paint on a wall can be evenly smeared through rotation of the painting roller, meanwhile, the second servo motor drives a driving gear to rotate, the driving gear is meshed and linked on a rack, and the painting effect is improved. And through rotation of a linkage screw rod, a butt joint base is in threaded linkage, then a first linkage rod and a second linkage rod are driven to be in linkage, the supporting base and a connecting structure on the supporting base can integrally and rapidly move to a proper height, and the coating uniformity is improved. The auxiliary mechanism can be suitab