When exploring the sustainable development path of agricultural production, organic nitrogen, phosphorus and potassium fertilizers (referred to as organic NPK fertilizers) have become an indispensable element. These fertilizers are not only derived from natural plants or animals, but also through a series of scientific treatments to provide comprehensive and lasting nutritional support for soil and crops. Data show that in developed countries, the nutrient supply of organic fertilizers has been close to half of the total fertilizer, which fully shows the importance of organic fertilizers in modern agriculture.