Finished products made of potassium dihydrogen phosphate are widely used in agriculture and food industry. In the field of agriculture, it is often made into foliar fertilizers, flush fertilizers, etc., which are used to supplement the phosphorus and potassium elements required for crop growth. For example, it can be used during the fruit expansion period to promote fruit growth and improve sugar content and coloration; it can be used during the crop resistance period to enhance drought and cold resistance. In the food industry, potassium dihydrogen phosphate can be used as food additives, such as buffering agent, nutrient agent, etc., used to regulate the pH of food, improve the taste and nutrient composition. For example, it can be added to bakery products to improve the elasticity of dough and make bread more fluffy. It should be noted that the purity requirements of potassium dihydrogen phosphate for different applications are different, and suitable products should be selected according to actual needs.