The diaphragm press filter press is composed of a diaphragm plate and a box type filter plate arranged to form a filter chamber. Under the pressure of the feeding pump, the slurry is input into the filter chamber, and the solids and liquids in the slurry are separated through a filter medium (filter cloth). When the solids in the slurry form a cake, air is then introduced into the diaphragm to fully press the solids in the filter chamber. Reduce the moisture content. Especially for the filtration of viscous materials and users with high requirements for moisture content, this machine has its unique characteristics. The filter plate is made of reinforced polypropylene by compression molding, and the diaphragm is embedded with the polypropylene plate, which is sturdy, reliable, not easy to fall off, and has a long service life. It is equipped with multiple safety devices to ensure the safety of operators and the normal operation of the filter press.