The invention relates to a jerusalem artichoke low-alcohol health drink and a preparation method thereof. The preparation method comprises the following steps: preparing jerusalem artichoke fermentation liquor from jerusalem artichoke as a main raw material by adopting the processes of pre-treatment, pulping, fermentation and the like, preparing jerusalem artichoke clarified juice through filtering, residue removal, standing, sedimentation, and kieselguhr filtering, adding auxiliary materials of honey, citric acid, xylitol, table salt, potassium sorbate and the like, and preparing the jerusalem artichoke low-alcohol health drink through filling, pasteurization and cooling. The product has the certain alcoholic strength, a unique flavour, a coordinated and soft taste and a golden yellow colour, is rich in functional factors of synanthrin, jerusalem artichoke fructo-oligosaccharides, terpenes and the like, as well as is beneficial to effectively supplementing various human essential nutritional factors, maintaining diet balance, enhancing intestinal functions, adjusting blood sugar, delaying senescence and improving body immunity in case of being drunk for a long time. The drink is especially suitable for being drunk by people with diabetes.