Abstract: In this paper, the contents of organics in the zymotic fluid during the ramie degumming process with high efficient bacteria L11 were measured periodically. Their change rules were also analyzed for studying the mechanism of biological degumming of ramie. The results showed that, the residual gum rate decreased greatly in the early period of degumming, flattened out in the middle period and decreased sharply again in the late periods of degumming. The quantity of live degumming bacteria increased continually in the early and middle periods of degumming and tended to decrease in the late period. The enzyme activity of pectinase and xylanase increased slowly in the early period, increased rapidly in the middle period and tended to decrease in the late period of degumming. The enzyme activity of cellulose was very low and changed little in the degumming process. The pH value decreased in the early and middle period and increased in the late periods, like a‘V’ shape. The content of protein firstly increased and then decreased, it showed a peak value. The curve of reducing sugar showed two peak values and varied like an‘M’shape.