NOVELTY - A joint-production of bleached paper pulp, lignose carbon fiber and fuel ethanol comprises (A) extraction of hemicellulose; (B) extrusion and extraction of hemicellulose; (C) preparation of bleached paper pulp; (D) extraction of lignose carbon fiber; and (E) extraction of fuel ethanol. The step (E) includes separating hemicellulose from hemicellulose and lignose hydrolysis liquid, inoculating 10-20% fermentation germ at 30-35 degrees C and pH of 5-6, fermenting for 20-30 hours, vaporizing and purifying to obtain fuel ethanol.    USE - Method for joint-production of bleached paper pulp, lignose carbon fiber and fuel ethanol (claimed).    ADVANTAGE - The method has simple process and can raise production quality without increasing production cost.    DETAILED DESCRIPTION - Joint-production of bleached paper pulp, lignose carbon fiber and fuel ethanol comprises (A) extraction of hemicellulose; (B) extrusion and extraction of hemicellulose; (C) preparation of bleached paper pulp; (D) extraction of lignose carbon fiber; and (E) extraction of fuel ethanol. The step (A) includes slicing plant material into sheets, cleaning sands, hydrolyzing for 120-180 minutes at 150-170 degrees C and adding alkali retaining hydrolysis liquid in pH of 7-9 while hydrolysis to prevent hydrolysis of fibric acid of cellulose; and using screen to filter hydrolysis liquid containing hemicellulose at regular pressure from sheet plant material to obtain hemicellulose and lignose hydrolysis liquid. The step (B) includes using parallel bi-rod extruder to exert no less than 1 MPa pressure at sheet plant material without hydrolysis liquid; extruding and kneading in compression ratio of 4:1 and forming sheet plant material to fine threads containing no greater than 60% water; and extruding and eluting hemicellulose and lignose hydrolysis liquid. The step (C) includes adjusting pressure to no less than 1 MPa during extraction process of hemicellulose, extruding and kneading to form sheet plant material to fine threads, controlling rubbing temperature at 90-120 degrees C, adding 2-3% alkali and 3-4% hydrogen peroxide to pre-bleach fiber; adding 3-6% sodium hyposulfite to pre-bleached fine threads, grinding and bleaching to pulp and obtain bleached paper pulp. The step (D) includes separating lignose from the hemicellulose and lignose hydrolysis liquid, adding 1-3% acetic acid to separated lignose and modifying to raise melt-operability; heating to 200 degrees to melt modified lignose, and spinning at more than 400 m/minute to produce lignose fiber raw thread in diameter of 0.1-0.9 mm; and heating to 250 degrees in 70% air and 30% oxygen at 0.5 degrees C/minute and performing thermal stability process, heating to 1000 degrees C and carbonize in helium to obtain lignose fiber. The step (E) includes separating hemicellulose from hemicellulose and lignose hydrolysis liquid, inoculating 10-20% fermentation germ at 30-35 degrees C and pH of 5-6, fermenting for 20-30 hours, vaporizing and purifying to obtain fuel ethanol.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic flow diagram illustrating a joint-production method of bleached paper pulp, lignose carbon fiber and fuel ethanol (Drawing includes non-English language texts).