Abstract: Yhe growing law of the microorganisms and the rhamnose variation in the fermenting course of sterilized and unsterilized Eulaliopsis binata show that the general growing law of non-cellulose decomposing series bacteria of Eulaliopsis binata，T85-260 complies with that of the microorganisms and is not affected by other factors in fermenting process；rhaninose content continues to increase before the complete separation of fiber until 0．35 g／L or so；the fermenting process of sterilized Eulaliopsis binata is a little longer；there is no need to sterilize Eulaliopsis Binata，tap water，equipment，etc．in the course of biopulping．