Wall painting device for building decoration

The invention discloses a wall surface painting device for building decoration, and relates to the technical field of wall surface painting equipment for building decoration, and the technical scheme is that the wall surface painting device comprises a movable base, a supporting plate arranged on the upper surface of the movable base and a movable plate movably arranged on one side of the supporting plate; a main painting plate is rotationally connected to the side wall of the middle of the side, away from the supporting plate, of the movable plate, a feeding box is arranged on the main painting plate, and a receiving groove is formed in one side of the upper surface of the movable base. The device has the beneficial effects that the main painting plate capable of moving up and down is arranged on one side of the supporting plate, the main painting plate rotates, the painting area is round, and the corner painting plates are arranged at the four corners of the moving plate, so that the painting area is larger