The effects of the jet stretch ratio and draw ratios of three-stage drawing including air drawing, DMF bath drawing, hot water and boiling water drawing and dry-hot drawing on the properties of PAN fiber were studied in dry-jet wet spinning. 研究了干-喷湿纺聚丙烯腈(PAN)初生纤维的喷丝头拉伸比和三级拉伸(空气拉伸、DMF浴拉伸、热水和沸水拉伸、干热拉伸)工艺中各拉伸比对纤维性能的影响。