In this study， a strain Y4 producing ethyl caproate was selected from strong-flavor Baijiu Daqu， and the strain Y4 was identified as Saccharomyces cerevisiae. Strain Y4 has relatively good tolerance. A high yield of ethyl caproate was obtained following the fermentation conditions: Sugar content 10 °Bx， initial pH 7.0， 6% ethanol， 0.04% caproic acid， cultivation temperature 25 ℃ and static fermentation 48 h. Through the simulated fermentation experiment， it was shown that the content of ester compounds such as ethyl hexanoate in the fermentation products of strain Y4 was relatively the highest. The research showed that strain Y4 was a strain with excellent characteristics， which could effectively increase the content of ethyl caproate in Baijiu.