Iron oxides/PI fiber membranes, especially magnetic PI membranes, are important flexible porous materials available application in the field of wave absorption, magnetic recording, membrane separation and catalysts. Therefore, alpha-Fe2O3 loaded PI composite fibers were prepared by electrospinning of poly (amic acid) PAA solution followed by loading Fe3+ on the PAA membrane by ion-exchange and then imidization. Then the alpha-Fe2O3 on PI membrane were reduced by H-2 to give magnetic PI membranes. The content of alpha-Fe2O3 and Fe3O4 on PI can be controlled by adjustment the ion-exchange time. The saturation magnetization of the composite membranes can reach up to 4 emu/g and the final composite membranes have magnetic response ability. (C) 2016 Elsevier B.V. All rights reserved.