Abstract: The microstructure of as-spun PAN fiber is analyzed,and a novel method for improving PAN(fiber′s) antistatic performance is investigated,that is,adding a bath of aqueous emulsion suspended with ZnO whiskers before coagulation bath and making the whiskers diffusing into the as-spun PAN fibers.The antistatic result of the aqueous emulsion suspended with single-pod ZnO whiskers are better than that of the aqueous emulsion suspended with tetrapod ZnO whiskers.When the time PAN fibers stay in the aqueous emulsion suspended with single-pod ZnO is(20 s,)the specific volume resistivity of PAN fiber reduces to(4.5×10¹⁰ Ω·cm,)and when the time is(60 s,) the specific volume resistivity reduces to(4.1×10⁸ Ω·cm.)