Environmental protection enzymes are mixed with detergents to reduce the use of chemical detergents. The treatment effect of domestic sewage is obvious. Environmental enzymes are beneficial to the growth and development of crops, can effectively inhibit the development of pests and diseases, and can improve the disease resistance and immunity of crops. Studies have found that environmental enzymes can increase soil salinity (the main influencing factors of environmental enzymes on saline-alkali land are pH value, conductivity EC and available potassium) and improve soil fertility. The results also show that environmental enzymes can improve the content of soil organic matter and phosphorus to some extent. At home and abroad, enzyme bacterial fertilizer has been widely used in agriculture. But there is a difference between homemade environmental enzymes. This is related to kitchen waste (raw materials), fermentation environment, fermentation strains, fermentation methods and other factors.