A method for preparing a stirred fermented brown rice beverage, inoculating the compound bacteria powder mixed with Lactobacillus plantarum, Lactobacillus acidophilus, Lactobacillus rhamnosus and Lactobacillus casei on a potato medium to obtain a compound culture solution; Take puffed brown rice flour, add pure water and stir into a uniform paste, heat in a water bath, adjust the pH value, add α-amylase for enzymatic hydrolysis reaction; boil for sterilization, deenzyme treatment, filter to remove filter residue; Add pure water to soak, add the filtered brown rice paste and add pure water to make up the volume, stir evenly, carry out ultrafine grinding, add sucrose, carry out pasteurization, then insert the compound culture medium, stir evenly, ferment , to obtain a stirred fermented brown rice drink. The advantages are: rich nutrition, delicate taste, probiotics, can improve lactose intolerance, promote gastrointestinal motility, reduce the anti-nutritional factor phytic acid in brown rice, and avoid the symptoms of flatulence and discomfort caused by eating a lot of beans.