Lactic acid bacteria fermented sour soup, preparation method and application thereof in preparation of instant lactic acid bacteria beancurd jelly

The invention discloses a lactic acid bacteria fermented sour soup, a preparation method and application thereof in preparation of instant lactic acid bacteria beancurd jelly. The preparation method of the lactic acid bacteria fermented sour soup includes: (1) preparation of fermentation sour broth; (2) preparation of oriented sour soup mother liquor; and (3) preparation of the lactic acid bacteria fermented sour soup. The preparation method of the instant lactic acid bacteria beancurd jelly includes: (1) preparing soybean milk powder; (2) taking the soybean milk powder and adding the lactic acid bacteria fermented sour soup; (3) immediately adding boiling water above 90DEG C for brewing, and stirring the substances rapidly for 5-10s; or inverting the step (2) and step (3). The invention also provides an application method of the lactic acid bacteria fermented sour soup in preparation of bean curd or dried bean curd. The lactic acid bacteria fermented sour soup provided by the invention can avoid the potentia