Colloidal mill is composed of stainless steel and semi-stainless steel colloidal mill. The basic principle is that the fluid or semi-fluid materials in narrow space can be fully ground by circular motion of fixed teeth and rotating teeth with high speed and relative linkage. Colloidal mill are made of high strength stainless steel except motor and some electrical parts, the key dynamic and static grinding discs are made by strengthened stainless steel, which have good corrosion resistance and wear resistance, and make the processed materials clean and no pollution. It is widely used in fine grinding of coatings, butter, cosmetics, toothpaste, fruit juice, salt solution, catalyst, polymer emulsion, pesticide, herbicide, fungicide, soybean products, automobile putty and other materials.