PAN/PVDF-HFP composite nanofiber membranes are prepared by electrospinning. The PAN/PVDF-HFP com-posite nanofiber membranes with 3 layer structure are treated by hot pressing and their mechanical properties are analyzed and evaluated. finally a button-type supercapacitor is assembled and its electrochemical performance is determined. The results show that the best ratio of DMF/acetone in electro-spun PAN spinning solution is 7∶3;the optimum hot composite temperature and time for PAN/PVDF-HFP are 120 ℃ and 60 s, respectively, the fracture strength of the composite membrane is 13.5 MPa. PAN/PVDF-HFP composite membrane as separator in supercapacitor, its ESR is 0.57Ωwhich is less than 0.64Ωof commercial film Celgard2400,CV curve remains better rectangle features at 5 mV/s scan rate, GCD curve shows capacitances of 79.55 F/g at 0.05 A/g current density which is higher than 62.78 F/g of commercial film Celgard2400.%静电纺丝技术制备PAN/PVDF-HFP复合纳米纤维膜，对PAN/PVDF-HFP/PAN三层结构复合膜进行热压处理，对其力学性能进行分析评价，最后组装纽扣型超级电容器，并对其电化学性能进行分析测试.结果表明：静电纺PAN纺丝溶液中DMF/丙酮溶剂体系的最佳配比为7∶3；PAN/PVDF-HFP热压复合最佳温度和时间为120℃和60 s，此时复合膜的断裂强度为13.5 MPa；PAN/PVDF-HFP复合膜作为超级电容器隔膜，其等效串联电阻（ESR）为0.57Ω，小于商品膜Celgard2400的0.64Ω；，CV曲线在5 mV/s扫速下仍保持较好的矩形特征，GCD曲线在0.05 A/g电流密度下比容量为79.55 F/g，高于商品膜Celgard2400的62.78 F/g.
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