In the experiment, 10 yeast strains capable of growing at above 45 ℃ were screened out from high-temperature Daqu. Among them,strian L7 could grow well at 58 ℃. The analyis of its physiological and biochemical properties suggested that strain L7 was Saccharomyces. The time of strain L7 at rapid growth phase, stationary phase and decline phase were 5 h, 24 h, and 30 h after the fermentation respectively. And its maximum alcohol yield was 55 %.