Nine isolates of cellulose-degrading Actinomycetes were isolated from different sediment samples from the Bhitarkanika Mangrove Forest. Cellulase and hydrolytic activity was confirmed with clear zone around the colony on basal salt agar medium using Congo Red. the enzyme assays for two enzymes, filter paper cellulase (FPCase), and carboxymethylcellulase (CMCase), were examined by method recommended by the international Union of pure and Applied chemistry (IUPAC). The extracellular activities ranged from 0.266-0.001 to 0.734 - 0.001 IU/mL for FPC and 0.501 - 0.014 to 1.381- 0.024 IU/mL for CMCase or endoglucanase assay.