The invention provides a recombined saccharomyces cerevisiae strain for producing ethyl alcohol, a construction method of the recombined saccharomyces cerevisiae strain and a method for producing ethyl alcohol through the recombined saccharomyces cerevisiae strain. According to the recombined saccharomyces cerevisiae strain for producing ethyl alcohol, a wild type saccharomyces cerevisiae strain is used as an original strain, an XI xylose metabolism pathway is introduced into the original strain, the expression of four key genes in a PPP pathway is enhanced, meanwhile, the aldose reductase gene GRE3 is knocked out, the nitrobenzene phosphatase gene PHO13 is optionally knocked out, and XI protein and XK protein introduced exogenously are positioned to a yeast cell membrane through the membrane positioning effect of a membrane positioning group. The recombined saccharomyces cerevisiae strain for producing ethyl alcohol can efficiently carry out xylose metabolism, so that co-fermentation of C5 sugar and C6 sugar is achieved, and therefore the higher ethyl alcohol conversion rate is achieved.