The invention discloses a health product capable of strengthening the immunity and delaying aging, a preparation method and applications thereof. The health product can strengthen the immunity and protect the liver, and is mainly composed of the following raw materials in parts by weight: 100 to 600 parts of DHA, 50 to 80 parts of EPA, 500 to 1500 parts of soybean lecithin, 255 to 500 parts of sporoderm-broken ganoderma spore powder, and 20 to 130 parts of selenium-enriched yeast. The provided health product can exert the potential of organism by adjusting gonad axis so as to achieve a new dynamic balance in an organism with imbalanced yin and yang. The DHA, EPA, and soybean lecithin are sustain-released so as to coordinate the absorption efficiency of traditional Chinese medicine components with that of DHA, EPA and soybean lecithin, thus the half life of components in the health product can be the same, and the eating frequency can be controlled more easily.