The present invention relates to an immunity enhancing health product and a preparation method thereof, wherein the raw materials comprise, by weight, 230-250 parts of cervus elaphus linnaeus, 6-18 parts of a ginseng ethanol extract, 5-15 parts of a ginseng residue water extract, and 28-48 parts of an ophiopogon japonicus water extract. The preparation method comprises: (1) crushing ginseng into coarse grains, carrying out reflux extraction with ethanol, filtering, concentrating the filtrate, carrying out vacuum drying, and crushing so as to be spare; (2) adding water to the residue obtained in the step (1), cooking, filtering, concentrating the filtrate, carrying out vacuum drying, and crushing so as to be spare; (3) crushing ophiopogon japonicus into coarse grains, adding water, cooking, filtering, concentrating the filtrate, carrying out vacuum drying, and crushing so as to be spare; (4) removing villus from cervus elaphus linnaeus in a burning manner, completely scraping, splitting into broken blocks, drying, placing to achieve a cold state, crushing into fine powder, and sterilizing so as to be spare; and (5) weighing the raw materials according to a certain weight part ratio, uniformly mixing, and tableting or loading into capsules. The immunity enhancing health product of the present invention has advantages of simple formula and human body immunity improving.