MSG Mill (Pin mill )is a impact pulverizer with a convertible pulverization knife. The equipment is made up of cross blade, oscillating movable impact hammer, fixed hammer style rotor, needle and stick style rotor, turbine style rotor and different sieve parts. The equipment is suitable for the pulverization of low and medium hardness material according to different blade, rotation ratio and power supply, the fineness is from a millimeter to 30 micrometer, the pulverization technical of the material can be adjusted according to different requirement. The equipment is widely suitable for the pulverization in many industries such as food, chemical, medicine, Chinese herbal medicine, foodstuff, plastic etc.