According to its water solubility， dietary fiber （DF） is divided into soluble dietary fiber （SDF） and insoluble dietary fiber （IDF）. In recent years， the incidence of hyperlipidemia continues to increase， seriously affecting people's life quality. More and more emerging evidence indicats that DF has a good regulating effect on lipid metabolism. However， these reports are mostly about the SDF. The role of IDF in regulating lipid metabolism has long been underestimated or neglected. This paper summarized the the regulation effectand mechanismof IDF in lipid metabolism， influencing factors and material basis of IDF regulating lipid metabolism. Furthermore， the existing problems and future key research directions of IDF industry were analyzed. This paper may provide a significant reference for the sustainable and healthy development of IDF industry.