NOVELTY - A biodegradable resin slow-release fertilizer comprises gelatin powder, vegetation roots, charcoal, corn bran, rice bran, pulverized coal ash, quartz sand, effective microorganism biological bacteria agent, calcium magnesium phosphate, potassium sulfate, magnesium chloride, diammonium carbonate, ferrous sulfate, melamine formaldehyde resin, urea-formaldehyde resin, alpha -olefin sulfonate, glycerin, propanol, auxiliary agent, and water.    USE - Biodegradable resin slow-release fertilizer.    ADVANTAGE - The slow-release fertilizer is not easily broken, improves quality of soil, and it has long-term supply of nutrients.    DETAILED DESCRIPTION - A biodegradable resin slow-release fertilizer comprises 3-4 pts. wt. gelatin powder, 10-14 pts. wt. vegetation roots, 8-10 pts. wt. charcoal, 13-16 pts. wt. corn bran, 12-14 pts. wt. rice bran, 6-8 pts. wt. pulverized coal ash, 9-11 pts. wt. quartz sand, 2-3 pts. wt. effective microorganism biological bacteria agent, 9-11 pts. wt. calcium magnesium phosphate, 8-10 pts. wt. potassium sulfate, 4-6 pts. wt. magnesium chloride, 10-14 pts. wt. diammonium carbonate, 3-5 pts. wt. ferrous sulfate, 2-3 pts. wt. melamine formaldehyde resin, 5-7 pts. wt. urea-formaldehyde resin, 3-4 pts. wt. alpha -olefin sulfonate, 0.5-1 pt. wt. glycerin, 2-3 pts. wt. propanol, 4-5 pts. wt. auxiliary agent, and balance water. The auxiliary agent comprises 6-7 pts. wt. agar, 3-4 pts. wt. ethylene glycol dimethacrylate, 1-2 pts. wt. bamboo coal powder, 7-9 pts. wt. borax, 5-6 pts. wt. zinc borate, 3-5 pts. wt. glycerol, 1-2 pts. wt. zinc sulfate, 2-3 pts. wt. ammonium molybdate, 10-14 pts. wt. starch, and balance water. The auxiliary agent is prepared by mixing agar and starch, adding 50 pts. wt. water, heating while stirring to dissolve, adding remaining components, continuously heating while stirring for 70-80 minutes, and cooling to room temperature. An INDEPENDENT CLAIM is included for preparation of slow-release fertilizer comprising crushing gelatin powder, vegetation roots, charcoal, corn bran, rice bran and pulverized coal ash into 160 mesh ultrafine dry powder, adding effective microorganism biological bacteria agent, diluting with 10 times water, adjusting water content to 30%, and fermenting to 37-42 degrees C for 15-18 days while turning once every 3 days; mixing calcium magnesium phosphate, potassium sulfate, magnesium chloride, diammonium carbonate and ferrous sulfate, adding 5-6 times water, heating while stirring to dissolve, adding melamine formaldehyde resin, urea-formaldehyde resin, alpha -olefin sulfonate, glycerin and propanol, and stirring for 10-15 minutes to obtain mixture; adding quartz sand, and heating while stirring constantly for 40-50 minutes to obtain gummy mixture; and mixing with fermented material, adding auxiliary agent, mechanically stirring for 30-40 minutes, and granulating.