Low-bitter fermented soya bean preparation process and post-fermentation device thereof

The invention relates to the technical field of food processing, and discloses a low-bitterness fermented soya bean after-fermentation device and a preparation method thereof.The low-bitterness fermented soya bean after-fermentation device comprises a tank body used for containing fermented soya beans, a distributor and a spraying pipe are rotationally installed on the upper portion of the tank body, the distributor evenly distributes materials into the tank body and is connected with a feeding pipe, and the spraying pipe is connected with a spraying pipe; the spraying pipe is used for spraying liquid into the tank body; the liquid inlet end of the liquid circulating pipe is communicated with a liquid accumulation cavity formed in the inner bottom of the tank body, and the liquid outlet end of the liquid circulating pipe is communicated with the spraying pipe at the upper part after passing through a circulating pump; the temperature control assembly is mounted on the tank body and is used for controlling the