Provided is an ultra-dispersion mixer, for stirring a mixed material for producing a high-quality slurry for an electrode of a secondary battery within a short time by disposing a low-speed blade and a high-speed blade for stirring a mixed material in a chamber so as to easily and effectively disperse elements of the slurry of a secondary battery, supplied to a mixer during a procedure of preparing the slurry of a secondary battery produced by performing mixing procedures multiple times, and disposing blade parts having a plurality of stirring characteristics so as to realize various stirring characteristics in the mixed material on the high-speed blade to increase the dispersion of the mixed material while the mixed material circulates in a high-shear disperser of the chamber and to simultaneously increase the temperature of a supplied solution at the beginning of stirring of the mixed material in the chamber.