As a separation device for solids and liquids, the mud cake after filtration by the filter press has a higher solid content and excellent separation effect compared with other solid-liquid separation equipment. The basic principle of solid-liquid separation is: the mixed liquid flows through the filter medium (filter cloth), the solids stay on the filter cloth, and gradually accumulate on the filter cloth to form a filter mud cake. The filtrate part penetrates the filter cloth and becomes a clear liquid without solids. It is worth noting that the filter plate of the filter press will be damaged to varying degrees during the working process. In severe cases, grooves will even form on the surface of the filter plate, thereby affecting the working efficiency of the equipment and the formation of the filter cake. Therefore, many manufacturers have noticed that improvements should be made from this aspect. At present, the domestic pharmaceutical industry has a greater market demand for specialized and automated filter press equipment. As a general equipment, the filter press has played an important role in domestic industrial production, and it is believed that it will also meet the development of the pharmaceutical industry.