The invention discloses an organic fertilizer for increasing the yield of eggplants. The organic fertilizer comprises the following materials in parts by weight: 40-50 parts of wheat straws, 13-16 parts of chicken manure, 12-16 parts of castor cake, 5-7 parts of fern root residues, 4-6 parts of clam shells, 6-10 parts of kelps, 10-15 parts of fructus ulmns pumila, 3-4 parts of an EM fungicide, 9-11 parts of lychee exocarp, 4-8 parts of coriaria sinica root, 2-5 parts of grass nodes in the stomach of ox and goat, 1-3 parts of N,N-dimethylurea, 1-3.8 parts of lentinan polysaccharide, 1-5 parts of fulvic acid, 2-5 parts of lime nitrogen, 0.1-0.5 parts of salicylic acid, 3-5 parts of potassium dihydrogen phosphate, 3-5 parts of potassium sulfate, 3-5 parts of ammonium dihydrogen phosphate, 3-5parts of diammonium phosphate, 2-4 parts of amino acid, 2-4 parts of humic acid, 2-4 parts of alginic acid and 2-4 parts of chitin. The organic fertilizer disclosed by the invention has the advantages that various nutritional elements can be provided for the growth of the eggplants, the growth of the plants can be stimulated, the permeability of soil can be improved, the metabolism can be promoted, the occurrence of disease and insect damage can be relieved and prevented; and due to photosynthetic bacterium fertilizer contained in a formula, the digestion and absorption of the eggplants for the chemical fertilizer can be promoted and the fertilizer utilization rate can be increased.