Outer wall material coating device

The invention relates to the technical field of constructional engineering, in particular to an outer wall material coating device which comprises an outer frame, a supporting frame is installed at the bottom of the outer frame, and a combined coating assembly for coating a wall surface with materials after the roughness of the wall surface is increased is installed between the two sides of the outer frame; the combined coating assembly comprises a first circular plate fixedly connected with one side of the inner wall of the outer frame, a plurality of limiting blocks are slidably connected to one side of the first circular plate, a second circular plate is fixedly connected between the ends, away from the first circular plate, of the multiple limiting blocks, an arc-shaped plate is installed between every two adjacent limiting blocks, one end of each arc-shaped plate is rotationally connected with the corresponding limiting block, and the other end of each arc-shaped plate is rotationally connected with the