Abstract:Abstract：A strain of aroma-producing yeast w2 was isolated from Daqu and applied to the production of Fuqu.The raw material ingredients ratio and process conditions were optimized.It showed that the total yeast as the evaluation index，the best raw material ratio of yeast bran：bran 10 g，fresh distillers grains 5.6 g，corn powder 4.2 g.Orthogonal design test method was used to optimize the yeast bran Fuqu-making process conditions.The optimum culture process of yeast bran was：moisture content 40%，culture time 18 h，and culture temperature 30℃.The optimized yeast bran was applied to the process of the light-style liquor started by xiaoqu，resulting in the ethyl acetate content increased by 3 times and the total ester content increased by 2 times at 2%inoculation after 24 hours of saccharification.