The coated-released fertilizers were prepared with two kinds of clay mineral-bentonite and zeolite.The media of soil,sand were used to study the nutrient release characteristics of two types of slow-released fertilizers.Pot experiment was conducted to investigate the effects of clay mineral coated slow release fertilizers on yield and nitrogen recovery in maize.The result showed that the slow-release effect of fertilizer was better than normal fertilizer.The yield increasing effect of coated fertilizer was significant higher than that of height of plant,fresh weight and dry weight of non-coated fertilizer.