The present invention belongs to the field of feeds and particularly relates to a special feed for sturgeons and a preparation method thereof. The feed comprises the following raw materials: krill powder, shell powder, seaweed powder, bone meal, dextrin, puffed soybeans, peanut bran, casein, fish oil, flaxseed oil, D-glucose, lysine, isoleucine, tryptophan, pine needles, realgar, semen strychni, radix rehmanniae preparata, semen cuscutae, radix stephaniae tetrandrae, agrimonia pilosa, rhizoma anemarrhenae, aloe vera, cactus, polygonum cillinerve tuberous roots, a compound enzyme, a compound probiotic and an antioxidant. Aiming at development situations of digestion system and immune system of the sturgeons, combining a screening of the raw materials, and combining proteins, fats and amino acids in a reasonable ratio, the feed further improves full absorption of nutrients by the sturgeons, improves digestibility, improves production and quality of the sturgeons, and meets huge demands of current markets for the sturgeons.