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In this paper, poly(vinylidene fluoride) nanofiber was prepared by an electrospinning method. Graphene oxide sheets was obtained via filtration from graphene oxide aqueous solution which synthesized by Hummers method. By sonication, a homogeneously dispersed and well distributed poly acylic acid and graphene oxide nanosheets solution were obtained, and this can be used to modify the neat poly (vinylidene fluoride) nanofiber membrane for not only increasing the hydrophilic properties but also improving the mechanical properties. The poly(vinylidene fluoride)/graphene oxide composite membrane was characterized by SEM, FT-IR, pore properties and mechanical properties. The composite membrane showed an appropriate pore size, excellent mechanical property comparing with pure poly(vinylidene fluoride) membrane. The results showed the membrane could be feasibly used as a MF membrane.