The simulation results show that the shaped degree is decreasing when the spinning temperature and intrinsic viscosity are increasing ; the spinning speed has little effect on the shaped degree when the pump mass throughput is constant ; the shaped degree is increasing with the increasing of pump mass throughput when the spinning speed is constant ; the cross air - blow conditions have much effect on the shaped degree ; the scope of shaped cegree is increasing when the aspect ratio of spinneret hole is increasing ; the shaped degree has obvious decreasing tendency in the small zone of spinning path and this decreasing became gently when the pump mass throughput is increasing 模拟的结果表明：扁平纤维的异形度随着纺丝温度及特性黏度的升高而降低；泵供量一定时，纺速对异形度的影响不大；纺丝速度一定，异形度随着泵供量的增大而增大；吹风条件对异形度的影响较大；随着喷丝孔的长宽比的增大，异形度增加的幅度也较大；异形度在纺程上较小的区间内有明显的下降趋势，并随着泵供量的增加其下降的趋势变缓。
