After the enrichment, the population of cellulose- degrading microorganisms had dramatically increased. By the selection of filter paper agar plates and the other selective medium, only one streptomycete strain was isolated finally. The morphology of JSD-1 on Gause 1 medium plate was shown in Figure 1a. The morphology of JSD-1 through optical microscope (40×) is shown in Figure 1b. It was shown clearly, after 8 days of inoculation, that long spores chains with 1-3 loose, open and spiral loops were formed on ISP2 medium at 30°C.