Preparation method for longan lactic acid bacteria beverage

The invention provides a preparation method for longan lactic acid bacteria beverage. The preparation method comprises the steps of performing pretreatment, namely selecting longans, preparing longan juice, preparing soybean milk, mixing and blending the longan juice and the soybean milk and performing fermentation and cultivation, wherein during preparation of the longan juice, drinking water which is 0-2 times of the volume of longan pulp is required to be added; during preparation of the soybean milk, hot water at the temperature of higher than 90 DEG C is required to be added for jordaning, so that a soybean milk liquid can be obtained; the weight ratio of the hot water to soybeans is (12-10):1; during mixing and blending, the longan juice and the soybean milk are mixed to form mixed juice according to the volume ratio of the longan juice to the soybean milk of 1:1; during fermentation and cultivation, lactic acid bacteria fermentation agents are inoculated into the mixed juice for fermentation and cultivation. The preparation method provided by the invention has the advantages that the problems of short guarantee period and difficulty in storage of the longans are solved; the processing and utilizing way of the longans is expanded, and the longan lactic acid bacteria beverage tastes delicious and has health protection value.