¡¾ÕªÒª¡¿Poly-m-phenylene isophthalamide/multi-wall carbon nanotubes (PMIA/MANTs) nanofibers were prepared via solution blow spinning technique.The change of the surface morphology and diameter distribution of the nanofibers with the spinning parameters was discussed. The effect of MWNTs on the crystallization property and mechanical properties of PMIA nanofibers membrane was discussed.The results showed that the PMIA/MWNTs nanofibers could be produced with good morphology as the drawing air pressure was 0.12 MPa and the inner diameter of the spinneret nozzle was 0.4-0.5 mm;as the load of MWNTs was increased, the average diameter and crystallinity of the nanofibers increased, the tensile strength of the nanofibers membrane increased and the elongation at break decreased; the PMIA/MWNTs nanofibers had uniform morphology and fine diameter with the average value of 372 nm, the tensile strength of the nanofibers membrane reached 41.85 MPa with a growth more than 86% as compared with that of pure PMIA nanofibers membrane as the MWNTs load was optimized as 0.3%