Collagen antioxidant peptide beauty cosmetics and preparation method thereof, the components include collagen antioxidant peptide, cucumber extract, vitamin C, vitamin E, lecithin, glycerol monostearate, wheat germ oil, Genma BP, glycerin, hyaluronic acid, nano-titanium dioxide, jasmine essential oil, pigment, and the rest are deionized water. The invention uses the antioxidant peptide obtained by enzymatically hydrolyzing the collagen in fish scales as the main functional component, and prepares the collagen antioxidant peptide beauty cosmetics through proper proportioning. The preparation process is simple, the formula is scientific, no need for a large amount of equipment investment, the cost is low, and it is suitable for large-scale industrial production; the obtained product has mild performance, refreshing and comfortable, and has anti-oxidation, anti-ultraviolet, antibacterial, whitening and moisturizing, scavenging free radicals in the body, and delaying aging and other effects, the cosmetic can naturally cover the skin surface, making the skin smoother, more delicate, whiter and more elastic.