Enteromorpha se-polysaccharide with biological activity as well as preparation method and application of enteromorpha se-polysaccharide

The invention discloses an enteromorpha se-polysaccharide with a biological activity, which is characterized in that the enteromorpha se-polysaccharide is heteropolysaccharide consisting of rhamnose, xylose, mannose, glucose and selenide groups. The invention further discloses a preparation method and an application of enteromorpha se-polysaccharide. According to the invention, an enteromorpha se-polysaccharide pure product with high added values and biological activity is prepared, selenium-containing content of polysaccharide is improved, so that physiological and pharmacological functions of selenium and enteromorpha se-polysaccharide are optimized, the activity is higher than selenium and enteromorpha se-polysaccharide, enteromorpha se-polysaccharide is beneficial to absorption and utilization of a human body, waste is changed into things of value, and enteromorpha se-polysaccharide has good social benefits, economic benefits and a wide application prospect.