The invention discloses a growth-promoting slow release fertilizer special for lotus roots. The slow release fertilizer comprises fertilizer particles, slow release layers wrapping the surfaces of the fertilizer particles and protective layers wrapping the slow release layers; the fertilizer particles are prepared from urea, monoammonium phosphate, monopotassium phosphate, ground phosphate rock, potassium nitrate, potassium chloride, potassium minerals, magnesium humate, zinc humic acid, humic acid urea iron, boracic acid, copper citrate, manganese citrate, saccharomycetes, lactic acid bacteria, molasses, chitosan oligosaccharide, fresh ginger and 1-hydroxyethylidene-1,1-diphosphonic acid. According to the growth-promoting slow release fertilizer special for the lotus roots, the formula is reasonable, nutrition is balanced, and the growth of the lotus roots can be promoted; meanwhile, the slow release effect is achieved, onetime application can be conducted before transplantation, the utilization rate is high, and the obtained lotus roots are good in quality and high in yield.