The invention relates to the technical field of health-care tea drinks, in particular to a tea drink capable of improving immunity based on traditional Chinese medicine food materials, vegetables and fruits and a preparation method of the tea drink. The health-care food is prepared from the following components in parts by weight: 5-10 parts of ganoderma triterpenes, 5-10 parts of ganoderma lucidum polysaccharides, 5-10 parts of adenosine, 5-10 parts of trace element selenium, 5-10 parts of natural organic germanium, 1.5-3 parts of coix seeds, 2.5-5 parts of gordon euryale seeds, 1-2 parts of organic acid, 1-2 parts of basic carbonate, 1-3 parts of a honey-containing mixture, 2.5-3.3 parts of a green tea extract, 0.5-2 parts of dried sweet-scented osmanthus, 2-5 parts of dehydrated dried snow pears, 0.5-1.5 parts of a seville orange flower extract, 1-2 parts of glutinous rice paper and a proper amount of distilled water. Main nutritional ingredients are extracted from lucid ganoderma, aromatic vegetables and fruits are added for seasoning, a user is pleasant to take, the immunity of the user is improved after the user takes the lucid ganoderma for a certain period of time, and food materials capable of tonifying the spleen, removing dampness, warming the kidney and dispelling cold are added, so that the transportation and transformation functions of the spleen and the stomach of the user are enhanced, in-vivo metabolism is enhanced, and the stomach and intestine are smooth; the mental state of a user is improved, the body is light, and each tissue function is active.