Oyster juice and oyster sauce stable in storage and preparation method of oyster juice and oyster sauce

The invention discloses storage-stable oyster juice and oyster sauce and a preparation method thereof, and relates to the technical field of food separation and extraction. The preparation method of the oyster juice comprises the following steps: centrifuging the oyster juice, adding a part of the oyster juice supernatant into the precipitate, adding compound protease to carry out an enzymatic hydrolysis reaction, carrying out enzyme deactivation after the enzymatic hydrolysis is finished, and carrying out homogeneous mixing with the remaining oyster juice supernatant so as to obtain the stable-storage oyster juice, wherein the compound protease comprises pancreatin and flavourzyme. According to the invention, the oyster juice is subjected to segmented treatment through centrifugation, concentration, composite enzymatic hydrolysis and homogenization technologies, insoluble or insoluble macromolecular precipitates in the oyster juice are decomposed into amino acids and polypeptides, the content of delicious su