PS2为Saccharomyces cerevisiae HA6（登录号SC09327）。 The effects of fermentation temperature, inoculum volume and pH on persimmon wine quality were investigated by three-factor second order regression rotation composite design. The result showed that the regression equation obtained between the factors and persimmon wine quality had a high reliability. All the three factors had significant influence on persimmon wine quality (p＜0.01＝. The optimum parameters were 22℃ of fermentation temperature, 10.4% of inoculum volume and 3.4 of pH, respectively. Then, the identification of the strain PS2 was performed by ITS1-5.8S-ITS2 rDNA sequencing. The results showed that the ITS1-5.8S-ITS2 rDNA sequence homology was 98% and the genetic distance 0.001 2 between the strain PS2 and Saccharomyces cerevisiae HA6(SC09327), which indicated that they belonged to the same strain.