More particularly, the present invention relates to a cosmetic composition for preventing skin aging and improving wrinkles containing 0.01 to 30% by weight of an extract from a yam cabbage extract. The present invention relates to a cosmetic composition for preventing skin aging and improving wrinkles, Wow; Quantifying the total polyphenol and flavonoid of the extract of the yam door extract obtained in the above step and measuring antioxidant enzyme activity; Performing a skin photoaging experiment with a mouse model, and measuring skin erythema and water content; Performing a biopsy of the mouse model; The genes extracted from the tissues obtained in the above step are amplified by RT-PCR to compare and evaluate the expression levels, and there is an excellent effect of preventing aging of the skin through regeneration of collagen fibers, antioxidative efficacy, and improvement of skin wrinkles.
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