The invention discloses special fertilizer for lotus roots. The special fertilizer comprises, by weight, 20-80 parts of duck manure, 10-35 parts of cow dung, 10-35 parts of earthworm cast manure, 20-25 parts of chicken manure, 5-20 parts of sugarcane residues, 5-20 parts of urea, 3-10 parts of monoammonium phosphate, 3-12 parts of monopotassium phosphate, 2-10 parts of potassium chloride, 5-20 parts of ground phosphate rock, 1-5 parts of trace elements, 0.1-0.5 part of bacillus subtilis, 0.2-0.7 part of lactic acid bacteria, 0.1-0.5 part of bacillus megatherium, 1-5 parts of humic acid, 0.5-1.5 parts of molasses, 1-2.5 parts of chitosan oligosaccharide, 1-4 parts of kaolin, 1-5 parts of calcium oxide and 50-85 parts of envelope material. The envelope material is composed of alkyd resin, attapulgite and paraffin. The special fertilizer for the lotus roots is reasonable in formula, balanced in nutrition and high in utilization rate, has a slow-release effect, meanwhile increases the yield of the lotus roots and improves the quality of the lotus roots.