The invention discloses a special fertilizer for golf law and a preparation method thereof, and relates to the technical field of organic fertilizers for garden plantation. The special fertilizer is prepared from oil tea meal, rapeseed bran, garden waste, alga slag, fish meal and an EM inocula. The preparation process comprises: A, material preparation; B, primary crushing; C, mixing; D, piling and fermentation; E, first drying; F, secondary crushing; G, granulating; H, screening; I, secondary drying; and J, grading. The special fertilizer has the characteristics of being comprehensive in nutrition, fine in particle size, lasting in fertilizer efficiency, economical, practical, green, environment-friendly, insect resistant, antibacterial, salt and alkali resistant, applicable to golf lawns, and the like; and also the special fertilizer is applicable to lawns in gardens and greening regions as well as golf lawns in various regions.