The present invention discloses a Chinese wolfberry fruit and chrysanthemum flower tea and a preparation method thereof. The Chinese wolfberry fruit and chrysanthemum flower tea consists of the following raw materials: buckwheat 60-80 parts, chrysanthemum flowers 12-15 parts, Chinese wolfberry fruits 15-20 parts, red dates 8-10 parts, longan meat 8-10 parts, lily 10-12 parts, lotus seeds 8-10 parts, licorice 4-6 parts, angelica keiskei 4-6 parts, lophatherum gracile 5-8 parts, hylocereus undulates flowers 3-5 parts, bitter melon seed powder 3-5 parts, and citrus maxima juice 20-30 parts. The obtained Chinese wolfberry fruit and chrysanthemum flower tea can maximumly preserve functional ingredients by protecting color and preventing oxidation. At the same time, the beneficial ingredients are more easily to be separated out by using baking and cold soaking. Meanwhile, by blending with other traditional Chinese medicines, the flower tea has enhanced health-care value, and improved and regulated mouthfeel and flavor, has a buckwheat flavor, and can be organically combined with tea drinks. The flower tea is both convenient for storage and consumption, can be instant for drink once being brewed, is light yellow and translucent in tea color, is fragrant, sweet, and mellow, has efficacies of clearing heat and lowering fire, supplementing kidney and tonifying liver, nourishing heart and calming mind, etc., can lower fire and relieve summer heat, and at the same time improves organism immunity, and is beneficial to human body health.