Health food capable of improving immunity and preparation method thereof

The invention discloses a health food capable of improving immunity and a preparation method thereof, and belongs to the field of health foods. A formula of the health food capable of improving the immunity comprises the following ingredients in parts by weight: 30-50 parts of a radix astragali extract, 30-50 parts of a radix rhodiolae extract, and 10-30 parts of ginkgo flavone. According to the preparation method, the three Chinese herbal medicine extracts are extracted by adopting a new ultrasonic extraction method; and the three Chinese herbal medicine extracts are used in combination so as to synergistically effect to play a better immunity-improving function. The health food emphatically takes people as research objects, and takes many aspects, including functions, absorbability, stability and so on, into consideration; and the selected product dosage form is capsules which have the characteristics of high bioavailability, convenient taking, and so on. 本发明公开了种能提高免疫力的保健食品及其制备方法，属保健食品领域。该保健食品配方成分包括(重量份)：黄芪