The invention belongs to the field of functional food production through microbial fermentation, and relates to probiotic fermented functional food capable of dispelling hangover and nourishing liverand a preparation method thereof. The probiotic fermented functional food is prepared by the following steps: pulverizing soybeans, turmeric and hovenia dulcis thunb, proportionally mixing the materials, and carrying out segmented solid-state fermentation by using bacillus coagulans, pediococcus acidilactici, bifidobacterium animalis, lactobacillus plantarum, lactobacillus paracasei and bacillus subtilis. According to the functional food, the content of probiotics in the product is effectively increased, the content and variety of beneficial substances in the product can be increased, some macromolecular substances can be converted into micromolecular substances, absorption by a human body is facilitated, the efficacy of the functional food in the aspects of dispelling hangover and nourishing liver is enhanced, and the functional food has the efficacy of regulating intestinal health. Besides, a large amount of lactic acid can be generated through fermentation of probiotics in the product, growth of spoilage microorganisms can be effectively inhibited, the shelf life of the product can be prolonged, preservatives do not need to be added, and the quality of the product is not affected.