Abstract: In order to utilize the sugar contained in the juice of Sanxiang grass (Miscanthus sp.) effectively, the mixture of the juice and molasses were fermented to produce alcohol by Saccharomyces cerevisiae GJ2008.The results showed that the fermentation with up to 90%efficiency and 11%alcohol production obtained under the condition as follows:the initial total sugar and pH were 18.0%～20.0% (m/v) and 4.5, respectively, the fermentation temperature was 32℃, and the fermentation was done without additional salt and nitrogen source.