NOVELTY - Organic fertilizer comprises 6-8 pts. wt. egg shell, 12-14 pts. wt. kaolin, 8-10 pts. wt. rice hull, 8-12 pts. wt. sweet potato slag, 7-9 pts. wt. vermiculite, 2-3 pts. wt. gelatin powder, 8-10 pts. wt. Chinese cabbage, 2-3 pts. wt. bacteria, 4-6 pts. wt. sodium alginate, 6-8 pts. wt. ferrous sulfate, 3-4 pts. wt. dipotassium hydrogen phosphate, 6-8 pts. wt. potassium carbonate, 12-14 pts. wt. urea, 3-5 pts. wt. zinc sulfate, 4-5 pts. wt. additive and water. Additive comprises 4-6 pts. wt. polyethylene glycol, 2-4 pts. wt. boric acid and 3-5 pts. wt. nano carbon.    USE - Slow release organic fertilizer used for planting pear tree (claimed).    ADVANTAGE - The slow release organic fertilizer improves water environment for plant growth, prevents nutrient loss, reduces frequent fertilizer use.    DETAILED DESCRIPTION - Organic fertilizer comprises 6-8 pts. wt. egg shell, 12-14 pts. wt. kaolin, 8-10 pts. wt. rice hull, 8-12 pts. wt. sweet potato slag, 7-9 pts. wt. vermiculite, 2-3 pts. wt. gelatin powder, 8-10 pts. wt. Chinese cabbage, 2-3 pts. wt. bacteria, 4-6 pts. wt. sodium alginate, 6-8 pts. wt. ferrous sulfate, 3-4 pts. wt. dipotassium hydrogen phosphate, 6-8 pts. wt. potassium carbonate, 12-14 pts. wt. urea, 3-5 pts. wt. zinc sulfate, 4-5 pts. wt. additive and water. Additive comprises 4-6 pts. wt. polyethylene glycol, 2-4 pts. wt. boric acid, 3-5 pts. wt. nano carbon, 10-12 pts. wt. yellow phosphorus slag, 6-8 pts. wt. ammonium humic acid, 3-4 pts. wt. ammonium alum, 1-2 pts. wt. tetraethyl orthosilicate, 2-3 pts. wt. n-butanol and water. An INDEPENDENT CLAIM is included for a method for preparing slow release organic fertilizer, which involves:    (A) dissolving gelatin powder in water to obtain solution;    (B) crushing and sieving vermiculite to obtain powder;    (C) stirring obtained powder with gelatin solution for 30-40 minutes;    (D) cooling obtained mixture to room temperature;    (E) filtering sand-shaped vermiculite at temperature;    (F) mixing egg shell, kaolin, rice hull, sweet potato slag and cabbage sludge;    (G) adjusting water content of obtained mixture to 30%;    (H) fermenting obtained mixture with bacteria at 35-38 degrees C for 12-16 days;    (I) mixing sodium alginate, ferrous sulfate, dipotassium hydrogen phosphate, potassium carbonate, urea, zinc sulfate, additive and remaining components with water;    (J) heating and stirring obtained mixture;    (K) mixing obtained mixture, fermented mixture and vermiculite material; and    (L) crushing and granulating obtained mixture to obtain product.