[Objective] The aim was to screen cellulose-decomposing bacteria with good decomposition effect.[Method] With straw that contained bacterium,rotten leaves and soil in maize field as materials,after the enrichment culture,the bacteria was isolated and cultured according to the diameter of hydrolyzed circle for primary and secondary screening.The crude enzyme liquid was prepared for the determination of CMCase activity and filter paper enzyme activity.[Result] 6 strains were isolated from the examples in diff...