NOVELTY - Biological organic fertilizer prepared by aerobic fermentation of 350-450 pts. wt. dairy manure, 100-300 pts. wt. pig manure, 100-300 pts. wt. chicken manure, 150-240 pts. wt. auxiliary material and 2-8 pts. wt. organic matter-decomposing inoculant, is claimed.    USE - Biological organic fertilizer.    ADVANTAGE - The biological organic fertilizer can reduce the fertilizer dosage, increase soil nitrogen, phosphorus and potassium capacity and quality of agricultural products, reduce fertilizer flow amount, and solve the soil plate structure and reduced fertility rate, hence eco-friendly.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the biological organic fertilizer comprising (1) pre-dehydration of pig manure, dairy manure, chicken manure and auxiliary material, uniformly mixing, where the mixed material has a moisture content of 45-65%, adding the organic matter-decomposing inoculant, mixing, rapidly decomposing the mixed material and carrying out aerobic fermentation to obtain decomposed organic material, and (2) processing of decomposed organic material: (a) through particle line production process by passing the decomposed organic material through a belt machine to the double-spiral stirrer, stirring, then conveying to a flat belt conveyor, scraping the obtained material into a feeding chamber through a pelletizer, then polishing to a round granule using a polishing machine, conveying the granule to a dryer, drying at less than or equal to 60 degrees C until the water content is reduced to less than or equal to 15%, then cooling in a cooling machine, entering the cooled material into a sieving machine for grading large finished product, crushing the large finished product and granulating into powder, then conveying to a finished product bin, packaging through a quantitative packaging system provided with computer metering, and storing the packed product having a grain diameter of 0.2-0.5 mm; and (b) through powder line production process by uniformly stirring the decomposed organic material through the stirrer, then sieving through a 50-100 meshes sieve, crushing the unsieved material, then sieving, continuously stirring through the stirrer, then screening and sieving, conveying the obtained powder to the finished product bin, packaging through the quantitative packaging system provided with computer metering, and storing the packed product.