The composition of kitchen waste is complex, containing starch, cellulose, protein lipids, inorganic salts, etc., as well as a small amount of trace elements such as nitrogen, phosphorus, potassium, calcium, magnesium, and iron. Compared with other garbage, the water content, organic matter content, oil content and salt content are relatively high, rich in nutrients, and have great recycling value. The kitchen waste crushing system can turn the kitchen waste into fertilizer and biogas, which can not only reduce the amount of landfill and protect the environment, but also have economic benefits.