The invention belongs to the technical field of microorganisms and food biology, and particularly relates to a eurotium cristatum strain which has been preserved in the common microorganism center of the China Committee for Culture Collection of Microorganisms, and the preservation number of the eurotium cristatum strain is CGMCC NO.11304. Strict breeding authentication shows that the eurotium cristatum strain has a series of characteristics suitable for tea leaf production and fermentation and can be used for producing various golden flower tea leaves such as golden flower dark tea, golden flower Liupu tea, golden flower Pu'er tea and golden flower clovershrub tea, and produced tea leaves are clear in characteristic and good in quality.