The colloid mill is driven by a motor through a belt drive to drive the rotating teeth (or rotor) and the matching fixed teeth (or stator) to rotate at a relatively high speed, one of which rotates at high speed, the other is stationary, and the processed material passes through Own weight or external pressure (produced by the pump) pressurizes to generate downward spiral impact force, which is subjected to strong shearing force, frictional force, and high-frequency vibration through the gap between the fixed and rotating teeth (the gap is adjustable) , High-speed vortex and other physical effects, so that the material is effectively emulsified, dispersed, homogenized and crushed, achieving the effect of ultra-fine crushing and emulsification of the material.