Wall Plastering Machine uses the conveyor belt to transport the ash forward and upwards, which can be completely wiped to the top (without leaving 1 mm) and completely wiped to the top with the conveyor belt. The conveyor belt can be manually stopped or supply ash at any position, realizing the plastering of windows up and down, and above the door (Note: There must be a distance of at least 50cm on the doors and windows, because the conveyor belt is 45cm from the top and automatically stops supplying ash). Insufficient ash causes secondary repainting after lack of ash on the wall, and can also deliver ash intermittently to reduce the falling ash during the ascent.