Preparation method of lithocarpus polystachyus rehd fermented health drink

The invention discloses a preparation method of a lithocarpus polystachyus rehd fermented health drink, which comprises the following steps that: (1) adding lithocarpus polystachyus rehd sweet tea leaves into water, heating, boiling, maintaining boiling for 10 to 20min, staying still so that the lithocarpus polystachyus rehd sweet tea leaves are precipitated, and taking the supernatant as sweet tea solution; (2) selecting yeast fermentation fluid, acetic acid bacteria fermentation fluid and lactobacillus fermentation fluid as fermentation broth; and (3) switching the fermentation fluid into the sweet tea solution, adding sugar, staying still and culturing for 48 to 72h at 30DEG C, and taking filtrate as the lithocarpus polystachyus rehd fermented health drink. The method takes the lithocarpus polystachyus rehd sweet tea as a culture medium to be fermented with lactobacillus, acetic acid bacteria and yeast, and the prepared lithocarpus polystachyus rehd fermented health drink has a plurality of health care functions and natural flavor. The lactobacillus, acetic acid bacteria and yeast that the method adopts can promote human development, improve the immunity and delay the body aging; and the lactobacillus has the effect of antibacterium, intestinal peristalsis promotion, digestion assistance, pathogenicbacteria killing, vitamin and amino acid synthesis in the intestinal tract and the like.