Abstract:Flaxseed gum is an anionic heteropolysaccharide，which mainly existed in the outer layer of flaxseed hull，accounting for about 9 % of flaxseed.As a hydrocolloid，flaxseed gum possesses the thickening，emulsification，gelling and antioxidant properties，which could be used as a food additive to interact with food components and further improve the processing properties of food.Moreover，as a water-soluble dietary fiber，flaxseed gum can improve serum glucose and lipid levels，regulate intestinal flora and lower body weight.This paper mainly focused on the latest research progress in the fine structure，functional properties，bioactivities and application of flaxseed gum，so as to provide reference for the high-value processing and utilization of flaxseed gum.