The present invention relates to a method for preparing a superabsorbent polymer exhibiting a more improved permeability and absorption rate while maintaining excellent absorption performance. The method for preparing a superabsorbent polymer may comprise the steps of: forming a hydrogel polymer containing a cross-linked polymer by cross-linked polymerizing, under the presence of an internal cross-linking agent, a water-soluble ethylene-based unsaturated monomer having an acidic group of which at least one portion is neutralized; forming a base resin powder by drying, pulverizing and classifying the hydrogel polymer; surface cross-linking the base resin powder under the presence of first alumina particles by using a surface cross-linking solution containing at least one surface cross-linking agent selected from the group consisting of a diol, triol or polyol containing C2-C5 alkylene carbonate, a C2-C12 alkyl group or C2-C12 polyethylene glycol, and diepoxy, triepoxy or polyepoxy containing a C2-C12 alkyl group or C2-C12 polyethylene glycol; and adding second alumina particles to the surface cross-linked superabsorbent polymer and mixing same.