The utility model has a cone-shaped mixing barrel and has a central rotating shaft, and the rotating shaft is provided with a blade sliding along the wall of the barrel, and the blade has an angle of inclination with the rotating shaft. The high-speed operation of the shaft produces a strong force to push the product toward the inner wall of the barrel. At this time, the surface of the cone of the barrel rotates at a high speed due to the blade with the inclined angle, so that the powder generates an upward movement along the inner wall, and the tumbling power causes the powder to follow. The inner wall rises to the butterfly head cover, and then returns to the center of the mixer, and quickly falls back to the bottom of the barrel to restart a new round of mixed tumbling movement. The heating plate covering the barrel wall heats the barrel wall and the heat passes through the barrel. The wall is conducted to the material so that the material can be fully mixed and coated.