NOVELTY - Bio-organic fertilizer is prepared by (a) selecting livestock and poultry excrement, (b) obtaining auxiliary materials including various crops of rice, crushing rice straw, and obtaining rice straw as base fertilizer of length 5-8 mm and rice straw as nursery fertilizer of length 3 mm, (c) drying the straw which absorbs water in the excrement, and fermenting the excrement, (d) performing composting process, and adding bacterial composition to the mixture, and (e) adding functional bacteria to the mixture and performing fermentation.    USE - As bio-organic fertilizer.    ADVANTAGE - The fertilizer has high quality. The method improves production efficiency of the fertilizer, avoids antagonistic action among all the functional bacteria, where the functional bacteria are symbiotic bacteria, consumes less time, utilizes microorganism which can grow at different temperature areas, and performs decomposition and deodorization of excrement within 7-10 days.    DETAILED DESCRIPTION - Bio-organic fertilizer is prepared by (a) selecting livestock and poultry excrement, (b) obtaining auxiliary materials including various crops of rice, crushing rice straw, and obtaining rice straw as base fertilizer of length 5-8 mm, and rice straw as nursery fertilizer of length 3 mm, (c) drying the straw which absorbs water in the excrement, and fermenting the excrement, (d) performing composting process, decomposition and deodorization of the materials, and adding bacterial composition to the decomposed materials, where the bacterial composition is chosen from photosynthetic bacteria, lactic acid bacteria, yeast, actinomycete, Penicillium, Trichoderma and Rhizopus, or their mixtures, and (e) adding functional bacteria to the mixture and performing fermentation using 50-200 g strain. The ratio of excrement with respect to the auxiliary material is 3:1. The functional bacteria is Azotobacter, phosphate solubilizing bacteria, silicate bacteria, lactic acid bacteria, Pseudomonas, Bacillus and actinomycete.