Abstract:Eurotium cristatum，commonly known as'golden flower'，is the dominant fungus in the post-fermentation process of Fuzhuan tea，playing a crucial role in the special quality and functional activities of Fuzhuan tea.During the fermentation，E.cristatum secretes abundant extracellular enzymes，such as polyphenol oxidase，amylase，and β-glucosidase，to metabolize and transform phenolic compounds such as catechins in tea.Recent studies have also demonstrated that E.cristatum can act on other plant substrates，such as Chinese herbal medicines，legumes and cereals，to transform their phenolic substances，thus affecting their biological activities.This article reviewed the studies about the effects of E.cristatum on the biotransformation and biological activities of plant phenolic compounds in recent years，aiming to provide a theoretical basis for the application of E.cristatum in the food and healthcare industries.