The preparation method comprises the following steps: on the basis of
momordica grosvenori and liquorice, adding one or more of the following raw materials in parts by weight: selfheal, dried ginger, galangal, kudzuvine root,
hovenia dulcis thunb,
dandelion,
sophora flower
bud,
mulberry leaf, chrysanthemum and the like, and mixing and extracting. Comprising the following raw materials in parts by weight: 7-20 parts of
momordica grosvenori, 3-10 parts of liquorice, 5-17 parts of selfheal, 5-10 parts of dried ginger, 5-10 parts of galangal, 5-17 parts of kudzuvine root, 5-17 parts of
hovenia dulcis thunb, 6-20 parts of
dandelion, 6-20 parts of
sophora flower
bud, 4-15 parts of
mulberry leaf, 4-15 parts of chrysanthemum and 800-1500 parts of RO water. One or more of selfheal, dried ginger, galangal, kudzuvine root,
hovenia dulcis thunb,
dandelion,
sophora flower
bud,
mulberry leaf, chrysanthemum and the like are added into
momordica grosvenori and liquorice, and screening, cleaning, extraction,
filtration, sterilization and filling are performed to obtain the beverage. The composition is reasonable in design, standard in compatibility, scientific in production process and convenient for industrial production. The obtained beverage is free of
cane sugar and
sweetening agents, conforms to the
healthy diet concept, and is particularly suitable for people with high
blood sugar to drink.