The invention relates to an organic fertilizer special for organic fruits, which is prepared from the following components in part by mass: 450 to 550 parts of edible fungus dreg, 150 to 250 parts of cotton seed hull, 100 to 200 parts of plant ash, 100 to 200 parts of cake, and 10 to 20 parts of microorganism fermentation inoculum. The preparation method comprises the step of performing staged fermentation maturity according to the difficult degree of the zymolysis of various raw materials to ensure that the release time of the nutrient in a final product roughly meets the requirement of the absorption of fruit trees. The special organic fertilizer is prepared by combining the steps of selection of different organic raw materials and fermentation according to the demand of the fruit treeson the nutrient and the nutrient content of various organic substances, and has the advantages of strong pertinency, no harmful substances, no pollution to the soil, and safe products; moreover, the fertilizer increases the yield of fruits, and improves the quality of the fruits.