The invention relates to a fertilizer for chrysanthemum, a fertilizer special for medicinal Chuzhou chrysanthemum and a preparation method thereof. In the conventional fertilizers, the fertilizer special for the medicinal Chuzhou chrysanthemum affording a long blooming period, a high flower yield and a high medicinal value and designed according to growth laws of the chrysanthemum is unavailable. The fertilizer comprises the following components in part by weight: 25 to 35 parts of organic matter, 7 to 10 parts of nitrogen, 7 to 10 parts of phosphorus, 4 to 6 parts of potassium, 0.5 to 1 part of zinc, 0.5 to 1 part of boron and 25 to 30 parts of controlled release formulation. The preparation method comprises the following steps of: compositing an organic fertilizer, crushing the controlled release formulation; mixing the organic fertilizer, the controlled release formulation and nitrogen, phosphorus and potassium raw material fertilizers; and pelleting the mixture to form the fertilizer. The fertilizer and the preparation method have the advantages that: the chrysanthemum and flower bud differentiation are promoted; blossom drop is reduced; the yield of the medicinal Chuzhou chrysanthemum is increased by 15 percent; the quality of the medicinal Chuzhou chrysanthemum is enhanced considerably so the content of flavone is up to 5.1 percent, which is 32 to 61 percent higher than that obtained by the conventional cultivation way; the chrysanthemum having an attractive color and a high medicinal value are obtained; the times of manuring due to controlled release effects are reduced; and physical properties of soils are improved.