Abstract: A reasonable intake of dietary fiber is essential for maintaining the health of the body.In order to develop dietary fiber-fortified foods that take into account nutrition,sensory and health,the separation,extraction and modification of insoluble dietary fiber(IDF)has attracted wide spread attention in recent years.A large number of studies have used physical forces,chemical reactions or enzymatic hydrolysis to enhance the functionality of dietary fiber with respect to food processing and nutrition and health.The modified IDF as an added ingredient showed positive impact on food processing,product quality and health effects,and is beneficial to the development of various dietary fiber-enhanced products.This article summarized the latest research progress on the extraction,modification and application of IDF,in order to provide references for regulating functional properties of dietary fiber and developing high-quality functional foods.