The pump is equipment with extensive uses, which can homogenize and fine material liquids or make the material liquids to form high-pressured spray. It is widely used in the production of milk, cold drink, beverage, edible chemicals, and areas such as pharmacy, biologic technology and etc. When the material liquid is homogenized under high pressure, the liquid delaminating can be prevented or reduced while the fineness, cleanliness, looseness and inner quality can be improved.