This disclosure relates to a method for preparing superabsorbent polymer. The method for preparing superabsorbent polymer according to one aspect of the invention comprises obtaining hydrogel polymer during the process of preparing superabsorbent polymer, and then, spraying a surface crosslinking solution comprising a surface crosslinker, alcohol, and ionic liquid to crosslink the surface of the pulverized polymer. The method for preparing superabsorbent polymer may use ionic liquid without using lower alcohol, or if lower alcohol is used together, may minimize the amount, and thus, reduce cost and additional drying treatment, and may control swelling of gel to prepare superabsorbent polymer with excellent product properties.