Self-falling concrete mixer is also called free-falling mixer. That is, the material is a free-fall mixer. In a self-falling mixer, the mixing drum rotates at an appropriate speed. The material also continuously rotates and is mixed in the mixing drum with mixing blades fixed in it. After the blades continuously raise the material to a certain height, the material leaves the blades to fall freely under its own weight. In this way, the materials are repeatedly stirred to ensure the uniformity of the material.