NOVELTY - Slow-release fertilizer comprises first layer, first coating layer, second layer, second coating layer, third layer and third coating layer in ratio of 4-6:1-2:6-8:1:10-12:2-3. First layer comprises fermentation product, first film layer of sea products and microorganism leavening agent in weight parts ratio of (50-60):(30-40):5. First coating layer is mixture of bentonite and and acrylic acid resin in ratio of 1:2-3. Second fertilizer layer comprises sugar filter mud, molasses, sawdust, medicine, medicine liquid, yeast waste liquid and fermentation product.    USE - Slow-release fertilizer used for sugar cane (claimed).    ADVANTAGE - The slow-release fertilizer is enriched in is nitrogen, phosphorus, potassium and microelement and increases nutrient absorption by sugar cane.    DETAILED DESCRIPTION - Slow-release fertilizer comprises first layer, first coating layer, second layer, second coating layer, third layer and third coating layer in ratio of 4-6:1-2:6-8:1:10-12:2-3. First layer comprises fermentation product, first film layer of sea products and microorganism leavening agent in weight parts ratio of (50-60):(30-40):5. First coating layer is mixture of bentonite and and acrylic acid resin in ratio of 1:2-3. Second fertilizer layer comprises sugar filter sludge, molasses, saw dust, medicine, medicine liquid, yeast waste liquid and fermentation product in weight parts ratio of 30-40:20-30:5-10:10-15:15-20:20-30:5, Second coating layer is mixture of zeolite and attapulgite in weight parts ratio of 1:3-4. Third layer comprises nitrogen fertilizer, phosphorus fertilizer, potash fertilizer and medicinal residue in weight parts ratio of 80:20-40:50-70:8-10. Third coating layer comprises beta-cyclodextrin. Medicinal residue is obtained by crushing radix isatidis, Oldenlandia diffusa and rhizoma acori graminei and extracting 2-3 times for 45-60 minutes, and filtered to obtain filter liquids. Filter liquids are combined, dried and then crushed through 100 meshes sieve.