It is composed of a U-shaped container, a spiral belt mixing blade and a transmission component. The U-shaped long cylinder structure ensures the small resistance movement of the mixed material (powder, semi-fluid) in the cylinder body. The positive and negative rotating screw is installed on the same horizontal axis, forming a low power and efficient mixed environment, the spiral blade is generally made of double or three layers, the outer spiral will collect the material from both sides to the center, the inner spiral will transport the material from the center to both sides, which can make the material form more eddy currents in the flow. The mixing speed is accelerated and the mixing uniformity is improved.