Preparation method of superabsorbent polymer

A method for preparing a superabsorbent polymer, comprising:

• forming a water-containing gel polymer, by a crosslinking-polymerization of a water-soluble ethylenically unsaturated monomer having acidic groups and an internal crosslinking agent;
• preparing a primary pulverized water-containing gel polymer by performing a primary water-containing gel pulverization of the water-containing gel polymer in the presence of a surfactant;
• preparing a primary dry water-containing gel polymer by a primary drying by moving the primary pulverized water-containing gel polymer;
• preparing a secondary pulverized water-containing gel polymer by performing a secondary water-containing gel pulverization of the primary dry water-containing gel polymer;
• preparing a secondary dry water-containing gel polymer by a secondary drying by moving the secondary pulverized water-containing gel polymer;
• and preparing superabsorbent polymer particles by pulverizing the secondary dry water-containing gel polymer,
• wherein the primary drying is performed such that a ratio of a water content of the primary dry water-containing gel polymer to a water content of the water-containing gel polymer formed during the forming step is 45% to 80%.