A very obvious characteristic of the sludge produced by food factories is that the content of organic matter is very high. For example, the sludge of beverage factories, fruit canning factories and other food production and processing factories all obviously have this characteristic, among them, pectin, food residue and so on have also intensified the difficulty of sludge dewatering. Organic sludge in food factories is too difficult to deal with, which has become a big trouble for enterprises. According to the above characteristics, we recommend automatic diaphragm filter press to improve the current situation of sludge treatment in food factories. According to the main components and characteristics of the sludge, coordinate with appropriate tempering reagents to modify the sludge to reduce the difficulty of sludge dewatering. The improved sludge is transported by the high-pressure plunger pump. Under the pressure of the high-pressure plunger pump 2MPa, the sludge of the food factory is preliminarily dehydrated and then enters into the ultra-high pressure sludge filter press, and finally the relatively clear water is discharged, it can be used for toilet washing, irrigation and so on, and the filter cake can be transported to special places for treatment.