The invention discloses clearing and moistening tea. Each part of the tea consists of 1.5-3g of arillus longan, 1.5-3g of fruit of Chinese wolfberry, 1-2g of radix polygonati officinalis, 1-1.5g of fried semen ziziphi spinosae, 1-1.5g of radix platycodonis, 1-1.5g of bulbus lilii, 0.1-1g of sweet almond and 0.1-1g of radix glycyrrhizae; and the finished product (the clearing and moistening tea) is prepared by processing the medicines and uniformly mixing the processed medicines. A preparation method of the clearing and moistening tea comprises the following steps: I, cleaning and selecting the arillus longan raw material; II, cleaning and selecting the fruit of Chinese wolfberry raw material; III, processing the radix polygonati officinalis raw material for later use; IV, cleaning and selecting the semen ziziphi spinosae raw material and frying the semen ziziphi spinosae raw material so as to obtain the fried semen ziziphi spinosae; V, processing the radix platycodonis for later use; VI, cleaning and selecting the bulbus lilii; VII, cleaning and selecting the sweet almond; VIII, cleaning and selecting the radix glycyrrhizae; IX, uniformly mixing the arillus longan, the fruit of Chinese wolfberry, the sliced radix polygonati officinalis, the fried semen ziziphi spinosae, the sliced radix platycodonis, the bulbus lilii, the sweet almond and the radix glycyrrhizae fully; and X, conducting packaging. The clearing and moistening tea provided by the invention is reasonable in prescription, simple in process, good in taste, easy for preservation and convenient to drink, and active ingredients are reserved; and the clearing and moistening tea has functions of calming nerves and promoting sleep, relaxing bowels, moistening lung and reducing phlegm, and nourishing liver and kidney.