This powder mixing machine/mixer adopts single movement mixing principle, inside the barrel stationary type 8 pieces of huge helical blades were designed, this will helps reduce equipment cost and improve mixing efficiency. When machine works, dry powder rolling at the bottom of barrel, helical blades’ function is make dry powder move to left and right and thus mixing completely. At the same time, as metering pump exists, fluid was uniformly sprayed into powder materials through nozzle. So by this simple rotating structure, mixing efficiency can be improved, and in the process of mixing, the sprayed fluid can be thoroughly mixed with dry powder.