The invention proposes a preparation method for a supercapacitor pole piece. The preparation method comprises the following steps of S1, pre-mixing a paste including deionized water, active carbon, a conductive agent and a binding agent for preparing the supercapacitor pole piece according to predetermined proportions, and entering the step S2; S2, carrying out high-speed dispersion on the paste to form a paste which can be used for coating, and entering the step S3; S3, applying the paste on a current collector to form the supercapacitor pole piece; and S4, rolling the supercapacitor pole piece at a predetermined temperature. Compared with a traditional intermittent dispersion process, the above preparation method for the supercapacitor pole piece has the advantages that the production efficiency is higher; and moreover, the supercapacitor pole piece produced according to the above preparation method has a better quality, the problems that the paste of the supercapacitor pole piece is long in dispersion time and is difficult to disperse and easy to agglomerate are solved, and the supercapacitor pole piece is better in stability and has a longer service lifetime.