Membrane filter press uses the pressure difference between the two sides of the filter cloth to flow out of the body penetrate the filter cloth, and the reject is blocked in the filter chamber to form a filter cake, it is steps of oil filtration. There is a large pressure difference on both sides of the filter cloth in the filtration process, the filter cake is formed by the increased filtration speed, and also the special filter cloth is used to make the filtrate pure and clear. Filter press can process materials that are difficult to filter. It is simple structure, easy to operate and lower cost.