NOVELTY - Organic fertilizer comprises perlite, fresh seaweed, soybean residue, peat, duck manure, gelatin powder, bio-fermentation agent, manganese sulfate, ferrous sulfate, sodium humate, calcium magnesium phosphate fertilizer, auxiliary material and water. The auxiliary material comprises zinc gluconate, nano-carbon powder, wintergreen oil, stone powder, ammonium persulfate, ferrous sulfate, methyl methacrylate, borax, glycerol and water.    USE - The organic fertilizer is useful for cultivating apple tree (claimed), promoting growth of fruit tree and improving soil.    ADVANTAGE - The organic fertilizer prevents soil compaction, does not agglomerate easily, and is distributed uniformly, absorbed by soil easily, required in reduced amount and environmentally-friendly.    DETAILED DESCRIPTION - Organic fertilizer comprises 8-10 pts. wt. perlite, 10-12 pts. wt. fresh seaweed, 14-16 pts. wt. soybean residue, 16-20 pts. wt. peat, 8-10 pts. wt. duck manure, 1-2 pts. wt. gelatin powder, 3-4 pts. wt. bio-fermentation agent, 4-6 pts. wt. manganese sulfate, 6-8 pts. wt. ferrous sulfate, 4-6 pts. wt. sodium humate, 12-15 pts. wt. calcium magnesium phosphate fertilizer, 4-6 pts. wt. auxiliary material and water (suitable quantity). The auxiliary material comprises 1-2 pts. wt. zinc gluconate, 0.5-1.5 pts. wt. nano-carbon powder, 0.8-1.4 pts. wt. wintergreen oil, 2-3 pts. wt. stone powder, 0.5-1 pts. wt. ammonium persulfate, 10-15 pts. wt. ferrous sulfate, 3-5 pts. wt. methyl methacrylate, 4-6 pts. wt. borax, 2-3 pts. wt. glycerol and water (suitable quantity). The auxiliary material is prepared by mixing the glycerol in water in a ratio of 1:8-10, adding zinc gluconate, nano-carbon powder, wintergreen oil, methyl methacrylate and ammonium persulfate, heating at 80-90 degrees C under condition of stirring for 20-30 minutes, then adding the ferrous sulfate and borax, obtaining paste, drying and crushing product. An INDEPENDENT CLAIM is included for method for preparing the organic fertilizer, which involves dissolving the gelatin powder in water in a ratio of 1:150 under condition of heating and stirring, adding the perlite after crushing into granules, stopping to heat, stirring for 30-40 minutes, cooling to room temperature, filtering to obtain perlite mixture, grinding the fresh seaweed into pulp, squeezing excess water after mixing with soybean residue, peat, duck manure and bio-fermentation agent, adding water in a ratio of 1:10, obtaining organic material, regulating water content in the organic material to 30-40%, fermenting at 36-40 degrees C for 12-16 days, mixing remaining raw materials, adding 10-14 times water, dissolving to obtain a solution under condition of heating and stirring, then adding the perlite material and fermented organic material, mixing, drying until water content reaches less than or equal to 15%, ultrafine grinding, granulating to obtain granules with particle size of 3-6 mm, and packaging product.