Filter cloth is used for filter presses. It is made of plates and frames arranged one after another, covered with filter cloth on both sides of the filter plates, and pressed by pressing device to press the plates and frames together, i.e., it constitutes a filter press chamber between the plates and the frames. Divided into chamber filter press, belt filter press, belt-type thickening and dewatering machine is a sludge, food commonly used filtration and separation equipment, in the early 18th century in the chemical production, and is still widely used in the chemical industry, pharmaceuticals, metallurgy, dyestuffs, food, brewing, ceramics, as well as environmental protection and other industries. Filter press consists of multiple filter plates and frames stacked to form a filter chamber, and the pressure as the driving force of filtration filter.