The invention provides a mixed fruit and vegetable fermented product and a preparation method thereof. The method comprises the following steps: (1) washing the mixed
fruits and vegetables, crushing to obtain mixed fruit and vegetable liquid, adding
pectinase and
cellulase into the mixed fruit and vegetable liquid and performing enzymolysis, thereby obtaining enzymolysis liquid; (2) adding a
carbon source, a
nitrogen source and inorganic salt into the enzymolysis liquid, inoculating
leuconostoc mesenteroides and performing primary
fermentation, thereby obtaining first
fermentation liquor when the pH value of the
fermentation liquor is reduced by over 0.5; (3) adding the
carbon source and the
nitrogen source into the first fermentation liquor, and inoculating compound
lactobacillus and performing secondary fermentation, thereby obtaining second fermentation liquor when the total
sugar content of the fermentation liquor is lower than 3wt%, wherein the compound
lactobacillus comprises
streptococcus thermophilus,
lactobacillus delbrueckii subsp. bulgaricus and
lactobacillus plantarum, and; and (4) uniformly mixing the second fermentation liquor, centrifuging, homogenizing and sterilizing the centrifuged supernatant, thereby obtaining the mixed fruit and vegetable fermented product. According to the scheme in the invention, the mixed fruit and vegetable fermented product with the advantages of low
sugar content, good taste and unique
flavor can be obtained in short fermentation time.