NOVELTY - Fermented brown sugar residue-based organic fertilizer comprises brown sugar residue, chicken manure, rice water, rotten wood, silt, effective-microorganism (EM) biological strain, ammonium hydrogen carbonate, colza cake powder, peanut cake powder, seaweed meal, citric acid, zinc sulfate powder, copper sulfate powder, sodium tripolyphosphate, potassium sodium tartrate, auxiliary agent and water. The auxiliary agent comprises e.g. dimethylpropane carboxylate, sodium carboxymethyl cellulose, epoxy chloropropane, dimethyl silicone oil, nano-carbon, diethylethanolamine, coal ash and water.    USE - Used as fermented brown sugar residue-based organic fertilizer.    ADVANTAGE - The organic fertilizer has nutritional content, and is environmental friendly. The method can effectively re-utilize chicken manure and rotten wood.    DETAILED DESCRIPTION - Fermented brown sugar residue-based organic fertilizer comprises 20-24 pts. wt. brown sugar residue, 10-12 pts. wt. chicken manure, 5-6 pts. wt. rice water, 10-14 pts. wt. rotten wood, 6-8 pts. wt. silt, 1.2-1.8 pts. wt. effective-microorganism (EM) biological strain, 2-4 pts. wt. ammonium hydrogen carbonate, 3-5 pts. wt. colza cake powder, 3-4 pts. wt. peanut cake powder, 2-4 pts. wt. seaweed meal, 1-2 pts. wt. citric acid, 0.5-0.8 pts. wt. zinc sulfate powder, 0.6-1 pts. wt. copper sulfate powder, 0.1-0.3 pts. wt. sodium tripolyphosphate, 0.4-0.7 pts. wt. potassium sodium tartrate, 0.4-0.6 pts. wt. auxiliary agent and water (suitable amount). The auxiliary agent comprises 1-2 pts. wt. dimethylpropane carboxylate, 0.2-0.5 pts. wt. sodium carboxymethyl cellulose, 0.3-0.8 pts. wt. epoxy chloropropane, 2-3 pts. wt. dimethyl silicone oil, 10-12 pts. wt. nano-carbon, 0.8-1.2 pts. wt. diethylethanolamine, 13-16 pts. wt. coal ash, 1.5-2 pts. wt. ammonium chloride and water (suitable amount). The preparation comprises mixing dimethylpropane carboxylate, sodium carboxymethyl cellulose, epoxy chloropropane, dimethyl silicone oil and ammonium chloride, and heating at 60-80 degrees C, stirring for 10-15 minutes, and dissolving nano-carbon and ash under mixing conditions, stirring to form a paste, crushing, and drying to obtain the product. An INDEPENDENT CLAIM is also included for preparing organic fertilizer, comprising (i) subjecting chicken manure to drying treatment, mixing with rotten wood, and crushing into particles, then adding brown sugar residue, colza cake powder, peanut cake powder, seaweed meal and slit, uniformly mixing at 150-200 degrees C, and carrying out steam sterilization; (ii) reducing the temperature to 30-40 degrees C, maintaining the temperature, diluting EM biological strain with water, spraying mixture of organic material, and fermenting by stacking for 6-8 days; (iii) mixing ammonium bicarbonate, citric acid, zinc sulfate powder, copper sulfate powder, sodium tripolyphosphate, sodium potassium tartrate and auxiliary agent with other remaining components, and adding water in an amount of 3 times, placing under acoustic intensity ultrasonic conditions of 0.4-0.8 w/cm2, and dissolving with stirring, and continuing the process for 30-40 minutes; and (iv) spraying the dissolved crude product on fertilizer, and uniformly mixing, adjusting water content at less than less than or equal to 20%, and grinding to powder form of 200-mesh sieve, and pelleting to obtain the product.