The invention provides a multifunctional plaster producing and processing spreading and coating device. Heating sheets, a stirring hopper, a rack, a supporting lining base, a machine base, supporting legs, a control switch, a plaster feeding hopper, a stirring motor, a stirring shaft, stirring blades, a small sucking pump, an installing frame, adjustable stype playing preventing fixing clamps, a cleanable detaching selecting spreading and coating nozzle structure, an adjustable adhesion preventing spreading and coating brush wheel structure and a losing preventing collecting temporary storage bottle structure are included. Through the arrangement of anti-skid pads, movable clamping plates, adjusting rods, fixing casing pipes, handles, wing-shaped screws and spreading and coating plates, stype can be better fixed and can be flatly laid to the upper surfaces of the spreading and coating plates, then, the wing-shaped screws are loosened, the handles are held by hand to adjust the positions of the adjusting rods in the fixing casing pipes till the movable clamping plates tightly press the two sides of the stype through the anti-skid pads, and then, the wing-shaped screws can be locked so that stype fixing stability can be guaranteed; and meanwhile, skid preventing fixing operation can be conducted, and accordingly smooth proceeding of the spreading and coating work is guaranteed.