The structure of modified PAN fiber was analyzed by DSC, X-Ray and TEM. The effects of ATO suspension content and preheating bath location on the antistatic and mechanical properties of PAN fibers were discussed. 讨论了悬浮液ATO含量和添加位置对纤维抗静电性、力学性能等的影响,采用差示扫描量热仪、X射线衍射、透射电镜对改性纤维的结构进行了分析。