The invention discloses health function tea and a preparation method thereof. The health function tea comprises 41 components including 
astragalus, Chinese arborvitae kernel, largehead atractylodes 
rhizome, red sage root, Chinese yam, 
schisandra chinensis, chrysanthemum, 
gastrodia elata, jujube, poria cocos, prepared 
rehmannia root, white peony roots, 
angelica sinensis, safflower, milkwort, mulberry fruits, prepared fleece flower root, root and 
vine of manyprickle acanthopanax, kudzuvine root, solomonseal 
rhizome, wolfberry fruits, yerbadetajo 
herb, 
ligustrum lucidum, 
dendrobium, grosvenor 
momordica, black sesame, cinnamon, pulp of cornus, 
eucommia ulmoides, barrenwort, dodder seed, 
cistanche, 
Chinese chive seeds, 
gynostemma pentaphylla, black soybeans, 
auricularia auricular, 
mushroom, 
kelp, oriental waterplantain 
rhizome, 
green tea and honey. The preparation method comprises the steps of magnetized water preparation, 
raw material soaking, 
raw material decoction, filtering and the like. The health function tea can be used for 
quenching thirst, supplementing 
body fluid, balancing 
yin and yang, activating and harmonizing qi-blood and effectively reducing sub-health symptoms of energy and stress ability weakening, low 
immunity and the like, enables the 
skin to be ruddy, the 
facial appearance to be sleek and the hair and the beard to be black after being taken for a long time and is particularly suitable for sub-health people as well as middle-aged and aged people.