Nostoc sphaeroids kützing is a new food material with many bioactive components and various biological activities. In this paper,the main chemical composition and bioactive components of Nostoc sphaeroids kützing were reviewed,and the biological activities in antioxidant,antimicrobia and anti-inflammatory,enhanced immunity,anticancer,adjusting cholesterol metabolism and anticoagulant effects were systematically summarized. Moreover,the future researches and applications were discussed. It provided useful information for the furth...