The invention relates to the technical field of food and particularly relates to a solid beverage containing prebiotics and probiotics and a preparation method thereof. Inulin, water-soluble dietary fiber and fructo-oligosaccharide are added and compounded to serve as prebiotic components, lactobacillus acidophilus, bifidobacterium lactis, lactobacillus rhamnosus, lactobacillus casei and streptococcus thermophilus are added and compounded to serve as probiotic components, and vitamin complex and yam flour components are added. The compounded prebiotics have synergistic effects and promote thecompounded probiotic components to quickly and stably proliferate and quickly take effect, the compounded probiotics can comprehensively meet the requirement of diversity of beneficial bacteria in theintestinal tracts, and furthermore, the added vitamin complex and yam flour are combined. By virtue of combination of traditional Chinese medicines and Western medicines, the prepared solid beverageis helpful for repairing the injured mucosa of the gastrointestinal tracts and regulating normal functions of the gastrointestinal tracts, capable of effectively promoting proliferation of beneficialbacteria and comprehensively resisting harmful bacteria, and helpful for reconstructing florae and establishing comprehensive defensive barriers for the intestinal tracts.