Abstract: Bioactive substances in algae can be applied in medicine，functional foods，food additives，ecological protection，animal feed and other fields. In this article，different bioactive substances in seaweed were introduced，including polysaccharides，proteins，terpenes，sterols，polyphenols，cyclic polysulfide，large ring lactone，etc.，and their application was reviewed in the aspect of drugs，food，industry and agriculture. There is a great potential in bioactive substances on medical and industrial applications. Research on the extraction of bioactive substances in algae is very importance in the future. Its biological structure，biological activity，and mechanism need to be further investigated.

Key words: Seaweed, Bioactive Substances, Application, seaweed, bioactive substances, medicine, functional food

摘要： 海藻中生物活性物质可应用于医药、功能食品、食品添加剂、生态保护、动物饲料等诸多领域。本文介绍了海藻中生物活性物质的种类，包括多糖类、蛋白类、萜类、甾醇类、多酚类、环状多硫化合物、大环内酯类等，综述了这些活性物质在药品、食品、工业及农业上的应用。指出国内在生物质活性物质在医药及工业上的应用有很大潜力，目前应注重对海藻中生物活性物质的提取方法研究，并对其生物结构、生物活性、作用机理等进行分析探讨。

关键词: 海藻, 生物活性物质, 应用, 海藻, 生物活性物质, 医药, 功能食品