Method for preparing ethanol from furfural dregs and corn through co-fermentation

The invention provides a method for preparing ethanol from furfural dregs and corn through coupling co-fermentation. The method comprises the following steps of: liquefying and partially saccharifying the corn serving as the starch raw material; coupling the corn with the furfural dregs serving as the cellulose raw material; and performing synchronous saccharification to prepare the ethanol through co-fermentation by using natural tea saponin as a surfactant. By the method, the traditional and mature starch ethanol technique is organically combined with a fiber ethanol technique, so utilization ratio of the starch raw material is increased and the efficiency of preparing the ethanol by using the fiber raw material is improved.