Fertilizer-grade calcium hydrogen phosphate, commonly known as white phosphate fertilizer or white fertilizer, is a by-product of the production of feed-grade calcium hydrogen phosphate. It is mainly used as raw material for compounding fertilizer, and can also be directly applied to farmland. When white fertilizer is applied to soil, it can meet the needs of early crop growth and provide nutrients for the middle and late crop growth. Compared with heavy calcium and superphosphate, it has low water content and is easy to control the production of compound fertilizer. It has fine particles and improves the appearance quality of compound fertilizer. Fertilizer-grade calcium hydrogen phosphate dissolves in the soil and releases many trace elements, which can be used as a supplement to various trace elements.