Fermented tea for improving flavor of green tea through mixed fermentation and preparation method of fermented tea

The invention discloses fermented tea for improving the flavor of green tea through mixed fermentation and a preparation method of the fermented tea, and belongs to the technical field of fermented tea. Through the mixed fermentation process, the bitterness of the low-grade green tea can be fully improved, the aroma components of the low-grade green tea can also be remarkably increased, and the mixed fermentation process is simple to operate and easy to regulate and control. Mixed bacteria of the screened eurotium rubrum Z1 strain and cladosporium M4 are adopted for fermentation, the Yunnan big-leaf low-grade green tea is transformed, the original astringent taste and bitter taste of the low-grade green tea are changed, the nutritional value and flavor composition of the tea are increased, and the problems that at present, low-grade tea, especially the Yunnan big-leaf low-grade tea, is low in utilization rate, difficult to sell and poor in taste are solved. And time and production cost are saved for productio