The production process adopted by this product is physical production method, which is produced by using high-quality potassium nitrate, high-purity ammonium nitrate, potassium dihydrogen phosphate and other water-soluble raw materials, and adding various trace elements such as boron and zinc, and applying computer formula and scientific, reasonable ratio. The product has the characteristics of good solubility, fast absorption, high utilization rate, can significantly improve crop yield and improve crop quality, and is suitable for sprinkler irrigation, drip irrigation, flushing, etc., to facilitate the integration of water and fertilizer, and to achieve water and fertilizer saving efficiently. It is especially suitable as topdressing for economic crops during fruit seasoning, like melons, vegetables (fruits), etc, apply 2-3 kg per acre, and apply once every 10-15 days.