The invention provides a method for preparing a low-
salt content soy sauce. The method comprises the following steps: (1) adding a
zygosaccharomyces rouxii solution into a sterile NaCl solution, wherein the NaCl solution is W1, mixing the W1 with
oil phase, and conducting homogenization under
high pressure to obtain W1-O primary
emulsion; (2) mixing
halophilic bacteria, tween 80 and the NaCl solution to obtain a W2 solution, mixing the W1-O primary
emulsion with the W2 solution again, and conducting homogenization under
high pressure to obtain a W1-O-W2 double-
emulsion; (3) fully mixing sterilized soybean flour and
wheat flour, inoculating the obtained mixture with
aspergillus oryzae spores, and aseptically culturing the substrate at a temperature of 30 DEG C for three days after ultra-
high pressure sterilization, wherein the cultured material is
yeast; and (4) adding
saline water with different concentrations into the prepared
yeast, wherein the just obtained material is mash, and respectively inoculating the three mash with the double-emulsion for
fermentation so as to obtain the finished product. The invention aims at the problem that too high
salt content of the existing soy sauce is harmful to the body health, embeds acidophilic
lactic acid bacteria and the
yeast with the double-emulsion so as to control the release of strains and to prepare the low-
salt content soy sauceproduct. The product reduces the
salt intake for the
human body, and reduces risk of diseases such as hypertension, renal insufficiency and cardiovascular
disease.