The invention relates to a compound premix for aquatic products. The compound premix is prepared from the following raw materials based on the percentage by
mass of air dried substances: 10%-15% of a seaweed
organism active extract, 5%-10% of a composite
acidifier, 5%-10% of compound probiotics
powder and the balance of a carrier. The invention also provides a preparation method. The method comprises the following steps: (1) carrying out
superfine grinding on raw materials of the seaweed
organism active extract, carrying out ultrasonic-
microwave synergistic extraction, filtering, wherein filtrate is taken as an extract liquid, carrying out enzymolysis and
fermentation on filter residues, so as to obtain a
fermentation liquid, respectively carrying out
freeze drying on the extract liquid and the
fermentation liquid, and then mixing at the ratio; and (2) carrying out
superfine grinding on the carrier, and then evenly mixing the ground carrier with the composite
acidifier, the compound probiotics
powder and the seaweed
organism active extract. According to the premix disclosed by the invention, marine
algae resources can be effectively utilized;
protease can be secreted; digestive absorption of
protein is facilitated; the anti-stress ability and the
disease resistance of organisms are enhanced; and the
growth speed of aquatic
livestock is improved, so that the culture cost is reduced and the culture benefits are significantly improved.