The invention discloses a fertilizer special for organic cultivation of Camellia oleifera and a preparation method thereof. The fertilizer comprises the following raw materials: soybean meal, a calcium magnesium phosphate fertilizer, a potassium-magnesium sulphate fertilizer, tea bran of Camellia oleifera, zinc sulfate heptahydrate, borax, etc. The fertilizer is prepared by the following steps: crushing, sieving, fermentation, stirring, and uniform mixing. The fertilizer comprises the following raw materials in percentages by weight: 25-75% of the soybean meal, 5-52% of the tea bran of Camellia oleifera, 6-23% of the calcium magnesium phosphate fertilizer, 9-19% of the potassium-magnesium sulphate fertilizer, 0.1-2% of zinc sulfate heptahydrate, and 0.1-2% of borax. The fertilizer has a scientific and reasonable formula, weight percentages of the raw materials are adjusted according to growth conditions for preparing the special-purpose fertilizer, in order to equalize nutrition of Camellia oleifera, improve better growth of Camellia oleifera, and improve soil environment as well as quality and oil output of Camellia oleifera; the fertilizer is safe and does not have pollution.