This series of Airflow crashing and grading machine for super fine powders is a kind of equipment that can crash the metal powder or non-metal powder into micro-level particle. It combines crashing, grading,mixing, and uniformity, which has the features of low consumption, uniform product particle size, high efficiency grading, no abrasion to milling body, no impurities entry, environment-friendly and etc. As to the easy oxidized materials, the inert gas is used as the medium to realize the close-loop crash. The inertgas is used in circulation with low loss. It provided with the self-diffluence and self-grading system, product particle  size  is  distributed  narrowly.  It  runs automatically, stable, and is easy to operate and maintain.