Increasing the activities of exo-β-glucanases,one of the important components of cellulase,is a key to strengthening the synergistic degradation of cellulase and reducing the cost of cellulolytic hydrolysis.The methods of MCC-agar plate screening and liquid culture medium of filter paper were used in this work respectively to screen Trichodermareesei transformants,obtaining 6 superior transformants with higher filter paper collapsing rate and growing rate on MCC-agar plates.Further screening experiment was ...