The nutritive composition in sargassum from haitian had been determined . the extraction of seaweed polysaccharides by hot water was studied . and the application prospect of seaweed polysaccharides was put forward 摘要测定了海南马尾藻的营养成分,对热水提取马尾藻多精进行了研究,并展望了海藻多糖的应用前景。