The invention relates to the field of composite fertilizers for crops, and concretely relates to a special slow release composite fertilizer for sesame plantation. The composite fertilizer is prepared by using the raw materials, by weight, 20-25 parts of decomposed livestock and poultry night soil, 10-12 parts of rice husk, 10-12 parts of sorghum straw, 3-6 parts of wood chip, 0.1-0.2 parts of gypsum powder, 18-20 parts of ammonium hydrogen phosphate, 1-2 parts of amino acid powder, 30-35 parts of potassium dihydrogen phosphate, 8-10 parts of urea-formaldehyde resin, 35-40 parts of urea, 8-10 parts of ammonium chloride, 4-5 parts of sodium tetraborate, 1-3 parts of sodium silicate, 15-18 parts of perilla cake meal, 1-3 parts of bark of Debregeasia orientalis, 10-12 parts of sludge compost, 0.01-0.02 parts of nordihydroguaiaretic acid, 2-3 parts of tungoiltree seed shell, 0.02-0.05 parts of cellulase, 0.05-0.08 parts of an EM inoculant and 3-5 parts of an assistant. The slow release composite fertilizer enables nutrients to be adsorbed and coated, so the nutrients cannot be lost, the fertilizer effect is lasting, and the fertilizing rule accords with the fertilizer demanding rule of sesame growth; and contained active components can promote the absorption and utilization of the nutrients by the roots of sesame plants, so the plant growth is strong, the fruit ratio is high, grains are plump, and the yield and income increasing effect is obvious.