Abstract:As an important bioactive natural product，laminarin has been proved to possess a range of biological activities，such as antioxidant，anti-tumor，immunoregulatory，blood lipid and sugar regulatory，antiatherosclerosis，anti-fatigue，anti-skin photoaging and probiotic activities，highlighting its great nutritive potential to be developed as functional foods.Studies have demonstrated the association between the structural differences of polysaccharide components and their various functional activities.Therefore，in this review，the research progress of extraction，separation，chemical structure，and physiological activity of laminarin，as well as its application as functional food ingredients was summarized，which may provide theoretical basis for the development of novel functional foods based on laminarin.