1.Alginate is a kind of macromolecule amylose that edible but unable digestant for human body, which has functions of hygroscopicity, adsorption, cation exchane, gelling and filtration in stomach and tharm[1]Reduce blood pressure, blood fat, cholesterin, and defend fatty liver[2]Prevent and remove radioactive elemeent and poisonous metals[3]Increase the paunch saturation to lose weight healthily[4]Increase the peristalsis of the intestines and stomach to prevent2.The low molecularized alginate has much stronger biological activity with obvious health care functions.[1]The low molecularized potassium alginate can adjust and dufend hypertension, postpone cardiovascular caducity, improve microcirculation[2]The low molecularized sodium alginate can reduce the blood fat[3]The low moleclarized calcium alginate is a new source to supplement calcium, and be easy to absorb[4]The low molecularized zinc alginate is good for brain and to defend agedness dementia[5]The low molecularized iron alginate can supplement iron and blood [6]The low molecularized magnesium alginate can preven and cure coronary heart disease.Also, alginate can be used for healthy function food and Pharmaceutical , aterials.