The invention relates to fabrication method and application of a nickel-fabric current collector, and belongs to the technical field of a flexible current collector. The fabrication method comprises the steps of taking gauze as a substrate, and sequentially performing roughing, sensitization, activation, reduction, chemical nickel plating and post-treatment process on the substrate so that a metalconductive nickel layer is uniformly coated on fiber of the substrate and the nickel-fabric current collector is fabricated. The pure-cotton absorbent gauze is sensitized and activated by a one-stepmethod, the operation program can be greatly simplified, and the qualified rate of a product is improved; a normal-temperature alkali chemical plating liquid is employed, the problem of plating liquidwaste caused by instability of the plating liquid under a high-temperature condition is prevented, the maintenance of a solution is facilitated, and operation is facilitated; and moreover, a lithiumion battery and a supercapacitor which are fabricated by employing the nickel-fabric current collector have the advantages of small interface internal resistance, high energy density and high pseudo capacitance, the production efficiency of the battery is greatly improved, the production cost is reduced, and the fabrication method is suitable for industrial production on a large scale.