Coated slow-release complete fertilizer is a new kind of fertilizer that provides nutrient release in balance with crop needs. It includes inorganic materials and/or organic polymers and is slightly water soluble, with the granular fertilizer at its core. This coating changes the nutrient solubility characteristics and lengthens and controls nutrient release. Studies on coated fertilizers have provided new ideas for improving fertilizer use efficiency and minimizing pollution to the environment due to fertilizer losses. Development of coated fertilizers is a promising green technology that not only reduces nitrogen loss caused by volatilization and leaching but also alters the kinetics of nitrogen release.