In this paper,fermentation ability of 5 kinds of active dry yeast available in market was studied.The result showed differences in the abilities when these yeasts were used in fermenting low-sugar dough and plain dough.Fermentation ability of ADY1 was the same on low-sugar dough and plain dough.However,the fermentation ability of strain ADY2,ADY5 and ADY4 on low-sugar dough was 3.2%,9.4% and 11.9% respectively higher than that on plain dough.After analyzing the fermentation rate and the glucose effect of the 5 strains,we concluded that strain ADY1 and ADY2 had little glucose repression and quicker fermentation rate when ferment maltose.The analysis on strain ADY4,ADY5 presented the opposite attributes in both glucose repression and fermentation rate.Based on the above described analysis on the 5 strains,conclusion could be drawn that strains with a higher maltose fermentation rate and lower glucose effect are more suitable for plain dough fermentation.