Abstract Polysaccharides that widely exist in seaweed have many biological activities such as regulating immunity, anti-tumor, anti-blood lipid and hypoglycemic. They are widely used in a verity of industries. Therefore, the research of seaweed polysaccharide has always been the focus. In this paper, the recent advances in the extraction, separation and purification of seaweed polysaccharides and their biological activities were reviewed. The application of seaweed polysaccharides was described in this paper.
Keywords Seaweed; Polysaccharide; Extraction; Application.