NOVELTY - Organic fertilizer comprises 40-50 pts. wt. wheat straw, 45-60 pts. wt. corn straw, 40-50 pts. wt. dung, 10-15 pts. wt. duck excrement, 15-20 pts. wt. filter mud, 5-10 pts. wt. diatomite, 3-5 pts. wt. gelatin, 2-3 pts. wt. beneficial microorganism bacteria, 8-10 pts. wt. starch, 10-14 pts. wt. brown sugar residue, 7-9 pts. wt. calcium superphosphate, 10-14 pts. wt. potassium sulfate, 5-7 pts. wt. ferrous sulfate, 8-12 pts. wt. monoammonium phosphate, 3-4 pts. wt. coating agent and balanced quantity of water. Coating agent comprises 2.5-3 pts. wt. dodecyldimethylamine oxide.    USE - Organic fertilizer used as soil modifying agent.    ADVANTAGE - The organic fertilizer is rich in organic substance.    DETAILED DESCRIPTION - Organic fertilizer comprises 40-50 pts. wt. wheat straw, 45-60 pts. wt. corn straw, 40-50 pts. wt. dung, 10-15 pts. wt. duck excrement, 15-20 pts. wt. filter mud, 5-10 pts. wt. diatomite, 3-5 pts. wt. gelatin, 2-3 pts. wt. beneficial microorganism bacteria, 8-10 pts. wt. starch, 10-14 pts. wt. brown sugar residue, 7-9 pts. wt. calcium superphosphate, 10-14 pts. wt. potassium sulfate, 5-7 pts. wt. ferrous sulfate, 8-12 pts. wt. monoammonium phosphate, 3-4 pts. wt. coating agent and balanced quantity of water. Coating agent comprises 2.5-3 pts. wt. dodecyldimethylamine oxide, 10-12 pts. wt. alkyd resin, 4-6 pts. wt. turpentine oil, 2-2.3 pts. wt. gypsum powder, 8-10 pts. wt. ethyl alcohol, 3-5 pts. wt. calcium stearate, 4-6 pts. wt. potassium oxide, 4.5-6 pts. wt. iron chloride, 1-2 pts. wt. iron ore powder and balanced quantity of water. Coating agent is prepared by mixing ethyl alcohol and turpentine oil and then adding water to obtain the mixture. Dodecyldimethylamine oxide, alkyd resin, calcium stearate, potassium oxide, iron chloride and iron ore powder are added into obtained mixture and then heated for 40-50 minutes to obtain another mixture. Gypsum powder and iron ore powder are added into obtained mixture and then stirred to obtain the product. An INDEPENDENT CLAIM is included for a method for preparing organic fertilizer, which involves:    (A) crushing wheat straw and corn straw and then adding water to obtain mixture;    (B) grinding mixture and then mixing with gelatin, beneficial microorganism bacteria, starch and brown sugar residue to obtain slurry;    (C) mixing calcium superphosphate, potassium sulfate, ferrous sulfate, and monoammonium phosphate and then adding water to obtain another mixture;    (D) stirring obtained mixture for 30-40 minutes;    (E) mixing slurry and obtained mixture and then heating at 70-70 degrees C to obtain third mixture;    (F) drying obtained mixture for 10-15 minutes to obtain granules;    (G) mixing granules with dung, duck excrement, filter mud, diatomite and remaining components to obtain fourth mixture; and    (H) spraying coating agent on obtained mixture to obtain the product.