The invention discloses a method for preparing fresh edible soybean fermented beverage.The method includes cleaning soybeans, soaking the soybeans in
sodium bicarbonate solution at the normal temperature, adding water into the soybeans and
grinding the soybeans to obtain soybean
slurry; carrying out
enzymatic hydrolysis on the soybean
slurry by the aid of alpha-
amylase,
cellulase and
neutral protease sequentially, filtering the soybean
slurry by the aid of 200-mesh filter cloth to obtain filter liquid, heating the filter liquid until the temperature of the filter liquid reaches 70 DEG C, adding white granulated
sugar,
fructooligosaccharide and
xylooligosaccharide into the filter liquid, uniformly mixing the white granulated
sugar, the
fructooligosaccharide, the
xylooligosaccharide and the filter liquid with one another to obtain soybean slurry, deactivating enzymes in the soybean slurry and sterilizing the soybean slurry; cooling the soybean slurry until the temperature of the soybean slurry reaches 45 DEG C after the enzymes in the soybean slurry are deactivated, adding bifidobacteria and
lactic acid bacteria into the soybean slurry and fermenting the soybean slurry; adding
sucrose fatty acid ester and
sodium carboxymethyl celluloses into the fermented soybean slurry, uniformly stirring the
sucrose fatty acid ester, the
sodium carboxymethyl celluloses and the fermented soybean slurry and homogenizing the
sucrose fatty acid ester, the sodium carboxymethyl celluloses and the fermented soybean slurry to obtain the fresh edible soybean fermented beverage.The method has the advantages that processes for producing the fresh edible soybean fermented beverage are simple, and accordingly the fresh edible soybean fermented beverage is easy to industrially produce; the fresh edible soybean fermented beverage is high in soluble
protein content owing to composite
enzymatic hydrolysis, products with low molecular weights can be obtained, and
flavor of the fresh edible soybean fermented beverage can be increased; the fresh edible soybean fermented beverage contains abundant
nutrition and has excellent healthcare functions of preventing intestinal diseases and reducing
cholesterol.