The study of the three major components(β-glucosidase,endo-1,4-β-D-glucanase and exo-1,4-β-D-glucanase) enzyme activity was influenced by the metal ions.The results showed that Co2+,Zn2+,Mn2+ were promoted to internal endoglucanase activity,Co2+ and K+ were promoted to External endoglucanase activity,Co2+,Mn2+,Ca2+and Mg2+ were enhanced the β-glucosidase activity.Because of its different component,the activity of enzymes cellulose from different sources was found to be dissimilar under the same metal ions c...