The invention relates to technical field of health care products, and concretely relates to an antioxidant health care product and a preparation method thereof. The invention provides the antioxidant health care product and the preparation method thereof, which aim at solving problems in the prior art, such as single daily dietary structure, insufficient anti-oxidant intake, bad antioxidation effects, and the like. The antioxidant health care product comprises the following components in parts by weight: 30-70 parts of an extract product of ginseng, 100-120 parts of inulin, 20-40 parts of an extract product of astragali roots, and 20-40 parts of an extract product of grape seeds. The preparation method is as follows: the materials are prepared into powder, tablets, particulate agents, capsules or oral liquid according to a conventional method. The health care product can be used for cleaning internal free radicals, improving antioxidation capability of the body, preventing aging of the body, and playing an aging delaying effect. The production technology is simple, the condition is easy to control, and product quality is stable without harmful residuals; and the antioxidant health care product can be produced in a pharmaceutical factory in a large scale, and has good economic and social benefits.