NOVELTY - Slow release organic fertilizer comprises 30-40 pts. wt. calcium magnesium phosphate fertilizer comprised film urea, 20-40 pts. wt. potassium dihydrogen phosphate, 25-35 pts. wt. potassium sulfate, 15-20 pts. wt. peanut powder, 10-15 pts. wt. corn straw coal powder, 5-8 pts. wt. diatomite, 15-25 pts. wt. bentonite, 1-2 pts. wt. borax, 4-6 pts. wt. modified humic acid, 20-40 pts. wt. animal feces, 20-30 pts. wt. rapeseed cake, 1-3 pts. wt. ferrous sulfate, 0.5-1 pts. wt. manganese sulfate, 1-2 pts. wt. copper sulfate, 1-2 pts. wt. ammonium molybdate and 1-3 pts. wt. polyvinyl alcohol.    USE - Slow release organic fertilizer used for grape (claimed).    ADVANTAGE - The slow release organic fertilizer is enriched in nutrient substance.    DETAILED DESCRIPTION - Slow release organic fertilizer comprises 30-40 pts. wt. calcium magnesium phosphate fertilizer comprised film urea, 20-40 pts. wt. potassium dihydrogen phosphate, 25-35 pts. wt. potassium sulfate, 15-20 pts. wt. peanut powder, 10-15 pts. wt. corn straw coal powder, 5-8 pts. wt. diatomite, 15-25 pts. wt. bentonite, 1-2 pts. wt. borax, 4-6 pts. wt. modified humic acid, 20-40 pts. wt. animal feces, 20-30 pts. wt. rapeseed cake, 1-3 pts. wt. ferrous sulfate, 0.5-1 pts. wt. manganese sulfate, 1-2 pts. wt. copper sulfate, 1-2 pts. wt. ammonium molybdate and 1-3 pts. wt. polyvinyl alcohol. Modified humic acid is prepared by dissolving brown coal humic acid with sodium hydroxide solution, and then heated. Sodium sulfite solution is mixed and stirred in the product, and then filtered and washed to obtain pre-processed humic acid. Pre-processed humic acid is mixed with ethyl alcohol solution, and then nanometer kaolin is added. The mixture is subjected to ultrasonic dispersing in water bath and filtered. The filter product is dried in a drying box, and then ground to obtain modified humic acid. An INDEPENDENT CLAIM is included for a method for preparing fertilizer, which involves:    (A) mixing peanut powder, corn straw stick coal powder and animal excrement uniformly in a reactor;    (B) heating the mixture at 40-60 degrees C, and then cooling to room temperature to obtain material A;    (C) mixing potassium dihydrogen phosphate, potassium sulfate, ferrous sulfate, modified humic acid, manganese sulfate, copper sulfate, ammonium molybdate and in a mixer at 70-76 degrees C to obtain material B;    (D) mixing material A and material B and carrying out fermentation at 45-50 degrees C for 40-60 hours, and then fermenting for 20-30 hours to obtain material C; and    (E) mixing diatomite uniformly with material C for 4-6 days, and then mixing remaining components and grinding to obtain final product.