The invention relates to a self-supporting porous nickel film preparing method and application of the porous nickel film as an electrode current collector for a super capacitor. According to the method, an insulating dot matrix is printed on a conductive substrate via screen printing, a nickel film is electroplated on the conductive substrate provided with the insulating dot matrix in a plating solution, an ultrathin self-supporting porous nickel film can be obtained after the nickel film is peeled from the substrate, insulating dot matrixes of different sizes can be obtained via use of different quantities of silk screens, and therefore porous nickel films different in aperture can be obtained, insulating dot matrixes different in density can be printed on the conductive substrate via a mobile two dimensional platform, porous nickel films different in pore density can be obtained, and the porous nickel films can be used as current collectors for the super capacitor. The method is simple in technology and low in cost, large area preparation can be realized, the obtained porous nickel films are excellent in flexibility, the nickel films are current collectors, electrodes that are made after active materials are electrodeposited are high in specific capacitance and excellent cycling stability, and the method has good application prospects.