The invention discloses a high-tower urea formaldehyde controlled release compound fertilizer, and relates to the technical field of agricultural fertilizers. The preparation method comprises the following steps: 40 to 60 parts of urea, 20 to 36 parts of monoammonium phosphate, 15 to 30 parts of potassium chloride, 2 to 6 parts of methyl alcohol and 1 to 3 parts of additive are taken as raw materials, and the raw materials are subjected to urea melting, reaction with methyl alcohol, mixing with potassium chloride and monoammonium phosphate, and spray granulation through a granulation spray tower to obtain the high-tower urea formaldehyde controlled release compound fertilizer. The compound fertilizer has the advantages that the nutrient requirement in different growth stage of crops can be met through once fertilizer application, additional fertilizers are not needed, the agriculture cost is lowered, and the agriculture benefit is improved.