Colla corii asini, ginger and date tea and preparation method thereof

The invention relates to a colla corii asini, ginger and date tea. The colla corii asini, ginger and date tea is prepared from 600-800 g of brown sugar, 180-220 g of rock sugar, 130-160 g of colla corii asini, 130-160 g of fresh ginger, 80-100 g of red dates and 50-70 g of wolfberry fruit. Water is added to decoct the three medicinal materials of red dates, wolfberry fruit and fresh ginger twice with each time of decocting lasting for 2 hours, decoction filtering is conducted, filter liquor mixing is conducted, vacuum negative-pressure and low-temperature extraction is conducted through a concentration unit, cyclical extraction and concentration are conducted with the temperature controlled to be 65 DEG C or below till the relative density is 1.30-1.35 g/mL, and cooling is conducted; brown sugar, rock sugar and colla corii asini are added, the mixture is made into granules, the granules are dried till the weight is 1000 g, and the colla corii asini, ginger and date tea is obtained. Colla corii asini serves as