The invention discloses an organic compound fertilizer. The organic compound fertilizer is prepared by mixing the following components by weight: 8 to 15% of a bean cake, 6 to 20% of urea, 8 to 15% of pig manure, 10 to 20% of straw powder and 10 to 15% of ferrous sulphate, with the balance being fly ash. According to the invention, since organic matters like the bean cake, pig manure and straw powder are added, more nutrient elements are provided for growth of crops, fertilizer efficiency is prolonged, and soil properties are improved; since fly ash is used as a filling material, the organic compound fertilizer is applicable to a variety of acidic and alkaline soils; moreover, elemental composition of the organic compound fertilizer is reasonable, so good yield and income increasing effects are obtained.