Abstract:Betalains are water-soluble and nitrogen-containing pigments，and have become a research hotspot in recent years because of their unique color，high safety，and a variety of biological activities.Betalains have been approved for application in the food industry as natural pigments.The present study briefly summarized the synthetic pathway and biological activities of betalains，emphatically analyzed the effects of different processing methods on the stability of betalains，and reviewed the limitations of the current research to provide references for the protection of betalains in future processing of agricultural products.