Abstract:Fermented foods are rich in microorganisms.The composition of microorganisms has an important influence on the function,texture and flavor of foods,and is also an important source for screening microorganisms with special functions.In this paper,the analysis methods of microbial diversity in fermented food were reviewed,including traditional methods and molecular biological methods.The advantages and disadvantages of these methods were compared,so as to objectively and comprehensively analyze the microbial diversity and flora structure of fermented food,and provide a basis for the development of fermented food.