The invention relates to a hydroponic camellia nutrient fluid and a preparation method thereof. Aiming to satisfy the nutrient requirement of camellias and promote the camellias to grow continuously and normally in the hydroponic environment, a nutrient fluid formula which is especially applied to the different growth periods of the camellias is adopted according to the hydroponic special nutrient requirement and the rhizosphere environment requirement of the camellias, and the hydroponic camellia nutrient fluid mainly comprises manure, trace fertilizer, internal secretion, germicide, inorganic acid for adjusting the pH value of the nutrient fluid, etc. The method not only symmetrically uses major elements and trace elements, and also increases the internal secretion to promote the root growth and the germicide to prevent the encroachment of root fungoids, but also simplifies the complicated procedure when in confecting according to the requirement of practical operation. In addition, the raw material of the nutrient fluid has a solid packaging, and the nutrient fluid is confected upon the spot, thereby being more suitable for the requirement of the factory production. The camellias which is processed through the hydroponics by using the nutritional formula not only has fast root growth and developed roots, but also the tresses of the camellias has fast growth vigor, luxuriance and fresh color, the ornamental period is long, the diseases and the insect pests are less, the camellias is sanitary, and the management is simple and convenient.