Compound fertilizer production often uses soil testing formulas to measure the nutrient status of the soil. Soil testing formula fertilization is based on soil testing and fertilizer field experiments. Based on the law of crop fertilizer demand, soil fertilizer supply performance, and fertilizer effect, and reasonable application of organic fertilizers, the application quantity, fertilization period, and application method of nitrogen, phosphorus, potassium, and medium and trace elements are proposed. Simply put, it means applying formula fertilizers scientifically under the guidance of agricultural technology personnel. The core of soil testing formula fertilization technology is to regulate and solve the contradiction between crop fertilizer demand and soil fertilizer supply. At the same time, targeted supplementation of nutrients required by crops can be carried out to meet the needs of crops and achieve balanced supply of various nutrients; To achieve the goal of improving fertilizer utilization efficiency and reducing dosage, increasing crop yield, improving agricultural product quality, saving labor, and increasing income.