NOVELTY - Fertilizer comprises mash of molasses alcohol, material obtained after processing fish, livestock and poultry excrement, bran, essential bacteria, metal complexing agent and inorganic fertilizer, where the material obtained after processing fish is obtained by taking fish scrap, mixing with water, boiling, filtering, cooling to obtain a thick semi-finished product, mixing the semi-finished product with edible brown sugar, bacterial enzyme and humic acid, and performing anaerobic fermentation to obtain product.    USE - As fertilizer.    ADVANTAGE - The fertilizer is environmentally-friendly, both organic and inorganic, rich in sodium, potassium, phosphorus and trace elements, and prepared cost-effectively with increased quality.    DETAILED DESCRIPTION - Fertilizer comprises 30-60 %mass mash of molasses alcohol, 10-35 %mass material obtained after processing fish, 10-15 %mass livestock and poultry excrement, 10-15 %mass bran, 0.1-1 %mass essential bacteria, 0.001-0.5 %mass metal complexing agent and 0.1-2 %mass inorganic fertilizer, where the material after fish processing is obtained by taking fish scrap, mixing with water in a ratio of 1:2, boiling at 120 degrees C for 30 minutes, filtering, cooling to room temperature to obtain a thick semi-finished product, mixing the semi-finished product with 0.005-0.01 part edible brown sugar, 0.01 part bacterial enzyme and 0.005-0.01 part humic acid, and performing anaerobic fermentation for 48-120 hours to obtain product, where the mash of molasses alcohol contains 35-95% organic matter and water (remainder). An INDEPENDENT CLAIM is included for method for preparing the fertilizer, which involves taking the mash of molasses alcohol, inoculating Bacillus coagulans, fermenting, adding the livestock and poultry excrement, stirring uniformly, measuring pH and metal ion concentration in the mash, adding the metal complexing agent, maintaining under static condition at 90-100 degrees C for 30-360 minutes, adding pH regulator to regulate pH to 7-8, performing anaerobic fermentation for 12-48 hours, adding the remaining above-mentioned raw materials except essential bacteria, fermenting for 12-36 hours, degumming, adding essential bacteria, and spray granulating into product.