The protein content of oat bran is the highest, 19.42%, in which the fat content is 10.57%, the starch content is 49.54%, the water content is 7.74%, the ash content is 3.40%, and the others are 9.33%. Oat bran has the highest protein content and good nutritional value. It is a high-quality protein. It can be used as a step-by-step research and development of health food, or as a natural cosmetic efficacy additive. Its efficacy mainly lies in moisturizing and softening the skin, smoothing the skin, being mild and non irritating, and being used in various types of skin.