The invention provides an electrode pad for a graphene-based supercapacitor and a preparation method of the electrode pad. The electrode pad comprises a current collector layer and an active material layer, wherein the current collector layer is a stacked graphene layer; and the active material layer is a porous graphene layer. The preparation method comprises the following steps: (1) preparing mixed slurry containing physically stripped graphene and a carbon nanotube or/and carbon fiber; (2) preparing mixed slurry containing the graphene which is prepared by a chemical oxidation method, a pore-forming agent and the carbon nanotube or/and carbon fiber; and (3) sequentially painting the mixed slurry obtained in the step (1) and the mixed slurry obtained in the step (2) on a substrate, carrying out heating in an inert atmosphere, carrying out pickling and washing in sequence, and drying and rolling the mixed slurry to obtain the electrode pad. The active material layer of the electrode pad is in tight contact with the current collector layer, so that the interface resistance and the internal resistance of a battery can be effectively reduced; and the electrode pad has high electrolyte adsorption and storage capacities and improves the high-rate discharge performance and the energy density of the capacitor.