Double-fermentation normal-temperature lactic acid bacteria beverage and preparation method thereof

The invention provides a double-fermentation normal-temperature lactic acid bacteria beverage and a preparation method thereof. The double-fermentation normal-temperature lactic acid bacteria beverage is prepared from the following raw materials: 25 to 40 permillage of whole milk powder, 2.0 to 4.0 permillage of whey protein powder, 60 to 90 permillage of white granulated sugar, 80 to 150 permillage of fermented fruit juice, 0.8 to 4.5 permillage of pectin, 1.0 to 6.5 permillage of soluble soybean polysaccharide, 0.5 to 1.5 permillage of sodium citrate, 0.5 to 1.5 permillage of sodium tripolyphosphate, 0.5 to 1.5 permillage of sodium hexametaphosphate and the balance of water. The invention also provides a preparation method of the lactic acid bacteria beverage. By adopting a stable system suitable for a relatively high fermented fruit juice addition amount, the addition amount of the fermented fruit juice is increased, and meanwhile, by adopting a buffer salt system for cooperation, the product can be kept s