Abstract: Rice bran is a kind of agricultural by-product, which is rich in renewable organic carbon sources and mainly used in feed and fertilizer production today. It has been reported that rice bran is rich in various active ingredients such as dietary fiber, polyphenols and polysaccharides, which have significant physiological activities such as anti-oxidation, lowering blood lipid and blood sugar. This paper starts with the bioactive components of rice bran, analyzes its the functional properties of rice bran and its active components in anti-oxidation, hypoglycemia, anti-obesity, hypolipidemic, immunomodulating, antitumor, etc, in order to improve the application value of the bioactive components of rice bran and provide theoretical basis for the effective utilization and industrialization of the following agricultural by-products.