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酒精可以作为清洁能源，广泛的用于各种领域。木薯是制备酒精的常用原料。本文在对木薯酒精研究的基础上，分析蒸馏废液循环回用的工艺对酒精发酵的影响。通过研究表明，当蒸馏废液循环回用比为 30% 时，对酒精发影响不大，当其回用比例≥ 50% 的时候，蒸馏废液中的酵母代谢产物以及污染杂菌会对酒精发酵造成影响，因此需要选择合适的回用工艺，以确保酒精发酵效率。“,”alcohol can be widely used in various fields as clean energy. Cassava is a common raw material for the preparation of alcohol. Based on the research of cassava alcohol, this paper analyzes the influence of recycling process of distilling waste liquid on alcohol fermentation. The research shows that when the recycling ratio of distilling waste liquid is 30%, it has little effect on alcohol fermentation. When the recycling ratio is more than 50%, the yeast metabolites and contaminated bacteria in distilling waste liquid will affect alcohol fermentation. Therefore, it is necessary to select appropriate recycling process to ensure the efficiency of alcohol fermentation.