The activity of hydrolysing chitosan with the xylanase and the others enzymes was compared. The result indicates that the xylanase had highest activity to hydrolysing chitosan, hydrolysate's molecular weight distributed on 8.6 kDa which hydrolysed by xylanase after 6 h, the others had lower activity than xylanase. In the process of isolation and purification, the xylanase activity losed 5 200 IU, chitosanase activity losed 300 IU. Analysing the xylanase's component by HPLC, the results indicated that the xylanase consistsed of...