The simple body of the horizontal mixer is equipped with paddle blades that rotate in reverse. The paddle blades form a certain angle to stir the materials in the axial and radial directions, so that the materials can be mixed quickly and evenly. The horizontal mixing mixer is driven by the motor through the belt transmission to the reducer to drive the shaft to rotate. The speed of the shaft and the structure of the paddle will weaken the gravity of the material. With the lack of gravity, the large differences in particle size and specific gravity of each material will be ignored during the mixing process. Intense stirring motion shortens one-pass mixing time, making it faster and more efficient. Even if there are differences in the specific gravity and particle size of the materials, a good mixing effect can be achieved under the rapid and violent tumbling and throwing of the staggered mixing blades.