Dark tea is one of the six major tea categories in China.Pile-fermentation is its core process,and the key of fermentation lies in the fusion of tea and microorganisms under hot and humid conditions,which ultimately forms the unique flavor and quality of dark tea.In order to understand the role of different kinds of microorganisms in the fer-mentation process of dark tea,the paper summarized the changes in the varieties and quantities of microorganisms in the pile-fermentation process of dark tea,the differences in the composition of microbial population of different kinds of dark tea,the analysis and identification techniques of microbial populations in the pile-fermentation of dark tea,the influence of the addition of important strains on the change of tea quality.This paper also introduced the production conditions of harmful microorganisms in dark tea and their guiding significance for safe production.
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