Dilute hydrochloric acid pretreated wood was studied through the orthogonal design, and the result of experiment show that the best of condition of dilute hydrochloric acid pretreatment is hydrolyzing temperature 105℃, concentration of HCl is 2.0%, reaction time 3h, after pretreatment the content of hemicellulose and lignin reduces 78.4% and 293% respectively. Wood pretreated with dilute hydrochloric acid was hydrolyzed by cellulase. The influential factors on the yield of enzymatic hydrolysis was studied in this paper including pH, temperatur...