NOVELTY - Preparing organic fertilizer for leafy vegetables, by mixing crushed straws of maize, wheat, soybean and sesame, adding ammonium hydroxide and water, incubating mixture, mixing crushed cassava residue, seaweed residue and water, adding Aspergillus niger and yeast, fermenting mixture, processing duck and duck feather, turning mixture, mixing all mixtures, shell powder, sodium humate and ash, adding effective microorganisms bacteria, fermenting mixture, adding bone meal and charcoal powder to fermented mixture, sterilizing, drying and packaging product.    USE - The method is useful for preparing organic fertilizer for leafy vegetables (claimed).    ADVANTAGE - The method enables preparation of the organic fertilizer rich in all the nutrients required for growth of the leafy vegetables. The fertilizer activates microbial activity of the soil microorganism, does not results in soil hardening, enables soil conditioning and increases air permeability of soil.    DETAILED DESCRIPTION - Method for preparing organic fertilizer for leafy vegetables, involves (a) mixing maize straw, wheat straw, soybean straw and sesame straw in a mass ratio of 3:3:2:2, crushing the straws into 0.4-0.8 cm size crushed straw product, adding 0.1% ammonium hydroxide and 50% water to the crushed straws, stirring mixture uniformly, sealing the mixture and incubating the mixture for 3-8 days to obtain mixture (A), (b) crushing cassava residue and seaweed residues into 20-30 mesh size product, mixing crsuhed cassava residue, seaweed residue and water in a mass ratio of 1:2:1 uniformly, adding composition comprising Aspergillus niger and yeast in a mass ratio of 2:1 to obtained mixture, where amount of the cassava residue, seaweed residue and water is 2% with respect to total mass of the mixture, and subjecting the mixture to aerobic fermentation at 28 degrees C for 3-5 days to obtain mixture (B), (c) taking duck and duck feather in a mass ratio 10:1, mixing component uniformly, subjecting the mixture to UV sterilization for 60-80 minutes, further performing ozone sterilization, turning the mixture every 10 minutes and sterilizing the mixture for 30-50 minutes to obtain mixture (C), (d) mixing the mixtures (A)-(C), shell powder, sodium humate and ash in a mass ratio of 8:5:10:0.2:0.5:0.1, adding effective microorganisms (EM) bacteria to obtained mixture in an amount 2% with respect to total mass of the mixture, and subjecting the mixture to aerobic fermentation at 30 degrees C for 5-8 days to obtain mixture (D), and (e) adding 0.2% bone meal and 0.2% charcoal powder to obtained fermented mixture, mixing components uniformly, performing ozone sterilization of the mixture at 50-55 degrees C for 24-36 hours, drying the mixture, packaging the mixture and sterilizing obtained packaged product by UV to obtain fertilizer product.