Introduction: This machine group can grind all kinds of materials of pellet feed, such as corn, sorghum, grain, legumes, broken cake pellet and others. Building in rotor, grind the raw material with no dead angle, finished products would be more even. Operate door can be moved fully, it is easy to be operated. In-built sealed avoid dust spill out, keep the working environment tidy and clean. It may carry on the ordinary grinding, also may carry on the thin grinding and the micro grinding. Thus it has been widely used in the raw material grinding of the large and medium scale feed factory, alcohol plant, lemon factory, food products factory and so on.