NOVELTY - Producing ethanol using wood fiber raw material, involves: crushing wood fiber raw material and impregnating with dilute acid; dehydrating the material; blasting the material to obtain porous fluffy wet material of pentose; wet washing the pentose porous fluffy material to obtain pentose, cellulose and lignin material; preparing dry matter of cellulose and lignin material, hydrolyzing cellulase, to obtain enzymolysis liquid containing hexose; separating lignin/hexose solution; concentrating hexose/pentose solution, and fermenting pentose sugar solution using bacteria to obtain 95% ethanol.    USE - For producing ethanol from wood fiber raw material selected from corn straw, rice straw, wheat straw, straw, or beanstalk (claimed), and also from paper pulp which is used for making paper, and in construction, textile and feed industry, where the ethanol is used as a combustion fuel.    ADVANTAGE - The method produces ethanol having high yield and high purity of 95%; is environment-friendly; and reduces energy consumption of the subsequent ethanol concentration.    DETAILED DESCRIPTION - Producing ethanol using wood fiber raw material, involves: crushing the wood fiber raw material impregnating with dilute acid at a temperature of 20-80 degrees C for 15 minutes; dehydrating the material at a temperature of 80-200 degrees C and pressure of 0.4-10 MPa for 1-35 minutes; blasting the material to obtain porous fluffy wet material of pentose; wet washing the pentose porous fluffy material at 10-100 degrees C by water to obtain pentose solution, cellulose and lignin material; preparing the dry matter of the obtained cellulose and lignin material by adding water at the temperature of 30-70 degrees C for 120 hours, hydrolyzing the cellulase at pH 1-7, to obtain the enzymolysis liquid containing hexose; separating out lignin from the obtained enzymolysis liquid, and obtaining hexose solution; concentrating the obtained hexose solution and pentose solution, and fermenting the pentose sugar solution using bacteria for 12-144 hours under the anaerobic condition at 2-45 degrees C, fermenting at pH 3-8 to obtain the fermented mash of ethanol; and obtaining ethanol having concentration of 95%.