▎ 摘　　要

NOVELTY - The preparation method of multifunctional composite fiber involves placing graphene oxide in piranha solution and then filtering, adding 200 ml ethanol aqueous solution, distilled water, anhydrous ethanol, glacial acetic acid and 1-2% 3-aminopropyltriethoxysilane to the filtrate and then drying, adding 2 g graphene oxide, 200 ml phosphate buffer solution, 20 ml glutaraldehyde solution, 0.1-1 g dodecanediamine, polyacrylonitrile powder and solvent to the mixture and then processing using mixed solution of dimethylformamide and water and hydroiodic acid, washing using water and rolling. USE - The method is useful for preparation of multifunctional composite fiber, which is useful for production of multifunctional fabric. ADVANTAGE - The method enables preparation of multifunctional composite fiber with excellent mechanical properties, electrical properties, static resistance, antibacterial effect, UV resistance and strength.