The invention discloses a preparation method of a beverage taking
rheum tanguticum leaves as a main
raw material. The preparation method comprises the following steps: A, material selecting: selectingraw materials required for preparing a beverage; B, cleaning: putting the selected
solid raw materials into a cleaning box, and carrying out cleaning treatment; C,
drying: putting the cleaned
solid raw materials into a
drying box, and carrying out
drying treatment; D,
impurity removal: putting the dried
solid raw materials into an
impurity removal box, and carrying out
impurity removal treatment;and E, crushing: putting the solid raw materials subjected to impurity removal into a
crusher, and carrying out crushing treatment. According to the invention,
rheum tanguticum leaves are used as main raw materials, are rich in chrysophanol and
emodin, have high nutritional value and health-care functions, and have the functions of invigorating the
stomach, helping
digestion, reducing fat, losingweight,
wetting and relaxing the bowels, and the prepared beverage is suitable for most people to drink, and particularly has obvious effects of reducing fat and losing weight for obese people.