The invention discloses organic fertilizer dedicated to teakwood. The organic fertilizer comprises the following raw materials: aquatic product leftovers with the water content of 45-50%, animal manure with the water content of 45-50%, fungus culture medium waste with the water content of 45-50%, egg shell, bean pulp, Russula lactea Fr, bitter gourd pulp, kieselguhr, water melonseed, alpha-amino acid, molasses fermentation liquor, oilseed rape shell, loofah sponge, oat, corn stigma, peanut coat, skin of winter bamboo shoots, corn bran, ginger skin, garlic skin, water hyacinth, green paint, gelidium amanisi, undaria pinnatifida, gloiopeltis, kelp, cactus, areca-nut, corydalis tuber, sword bean, pumpkin seed, lignum dalbergiae odoriferae, rhizoma arisaematis, mangnolia officinalis, prepared rehmannia root, the tuber of stemona, rhizoma cimicifugae, fructus amomi, pseudo-ginseng, poria cocos, radix sophorae flavescentis, mint and the root of Chinese pulsatilla. The invention further discloses a preparation method of the organic fertilizer dedicated to teakwood. The organic fertilizer dedicated to teakwood prepared through the preparation method disclosed by the invention is rich in organic matter, improves the drought resisting, cold resisting and disease resisting capacities of the teakwood, and remarkably increases the height of seedling, ground diameter, root length and biomass.