The invention discloses a nickel foam/ITO-NWs material, a supercapacitor and preparation methods thereof. The preparation method of the nickel foam/ITO-NWs material comprises the steps of 1, completely soaking the foamed nickel in dilute hydrochloric acid, and carrying out ultrasonic treatment after standing, then taking out, and drying under a vacuum condition; 2, flatly paving a PS small ball onthe surface of ultra-pure water, and then transferring to the surface of the foamed nickel pre-processed in the step 1 in a self-assembling mode, and then drying in a vacuum and room-temperature environment; and 3, growing ITO nanowires on a PS small ball template by utilizing an electron beam evaporation method, and then naturally cooling to room temperature in a vacuum environment to obtain thenickel foam/ITO-NWs material. The nickel foam/ITO-NWs material is excellent in electrochemical performance; constant-current charging and discharging are carried out under the current of 10mA, and the capacity of a single electrode reaches 112[mu]Ah/cm2, so that the material is an ideal supercapacitor electrode material.