NOVELTY - Fermented organic fertilizer is prepared by mixing 1000 pts. wt. dairy manure, 50-80 pts. wt. plant straw, 40-60 pts. wt. Paulownia sawdust, 20-30 pts. wt. eggshell powder, 0-15 pts. wt. furfural residue, 8-12 pts. wt. peanut shell powder, 0-15 pts. wt. volcanic ash, 5-10 pts. wt. coconut shell active carbon, 3-5 pts. wt. composting accelerator, adding mixture with 200 times of 3-5% of probiotic bacterial liquid, uniformly stirring, controlling water content to 50-60%, and fermenting for 5-8 days at 50-65 degrees C.    USE - Method of preparing fermented organic fertilizer (claimed) used for promoting crop growth.    ADVANTAGE - The method has fast fermentation speed and composting degree, increased ventilation property for good decomposition, and high efficiency. The obtained fertilizer can improve crop yield and quality.    DETAILED DESCRIPTION - Preparation of fermented organic fertilizer comprises: (A) mixing 1000 pts. wt. dairy manure, 50-80 pts. wt. plant straw, 40-60 pts. wt. Paulownia sawdust, 20-30 pts. wt. eggshell powder, 0-15 pts. wt. furfural residue, 8-12 pts. wt. peanut shell powder, 0-15 pts. wt. volcanic ash, 5-10 pts. wt. coconut shell active carbon, 3-5 pts. wt. composting accelerator, adding mixture with 200 times of 3-5% of probiotic bacterial liquid, uniformly stirring, controlling water content to 50-60%, and performing primary fermentation for 5-8 days at 50-65 degrees C; (B) after primary fermentation is finished, completely turning compost, then adding compost with 4-6% bentonite, 3-4% triple superphosphate, 2-3% sodium bicarbonate, 1-2% polyacrylamide and 2-3% bamboo charcoal powder, uniformly stirring, continuously keeping preliminary fermentation condition, turning every 5-6 days, and finishing fermentation after 10-15 days; and (C) drying obtained fermentation product until water content is 30-40%, pulverizing, sieving through 60-80 meshes, adding 3-5% plant ash, 1-2% garlic oil, 1-2% Eucalyptus oil, 5-8% sodium silicate, 1-2% folium artemisiae argyi powder, 1-2% neem leaf powder, and 0.5-1% camphor powder, uniformly stirring, granulating, and drying to obtain the organic fertilizer.