A micronizing apparatus for hydrogel of super absorbent polymer includes: a body having a transfer space where hydrogel is transferred, and a discharge space where ground hydrogel is discharged; a first rotation shaft disposed in the transfer space, wherein at least one screw is formed on an outer perimeter surface of the first rotational shaft to transfer the hydrogel along a longitudinal direction of the body; a hole plate fixed to the body and having a plurality of through holes; and a second rotation shaft disposed in the discharge space, wherein a cutter is attached and spaced from the hole plate by a predetermined distance, to grind the hydrogel transferred by the screw, wherein a rotation speed of the first rotation shaft and a rotation speed of the second rotation shaft may be independently controlled.