Abstract: [Problem] Provided is a method for producing a water-absorbing resin powder excellent in water absorption speed. [Solution] The method for producing a water-absorbing resin powder according to the present invention includes a polymerization step of polymerizing an aqueous monomer solution to obtain a crosslinked hydrogel polymer, a gel-crushing step of crushing the crosslinked hydrogel polymer after the polymerization step using a gel-crushing device to obtain a crosslinked particulate hydrogel polymer, and a drying step of drying the crosslinked particulate hydrogel polymer to obtain a dried product, and in the method, the gel-crushing device includes an input port, a discharge port, and a main body incorporating a plurality of rotation axes each including a crusher, in the gel-crushing step, the crosslinked hydrogel polymer is continuously put into the gel-crushing device from the input port, the crosslinked hydrogel polymer is continuously crushed by the crusher at 50° C.

Abstract: The present invention addresses the problem of providing; a water absorbent resin powder having a reduced amount of fine powder generated and a reduced amount of fine powder recovered; and a production method for the water absorbent resin. The production method of the present invention includes a drying step and a fine powder granulation step. The drying step is for obtaining a dried polymer by drying a particulate water-containing gel crosslinked polymer which is obtained using an acid group-containing unsaturated monomer as a main component. The fine powder granulation step is for obtaining a fine powder granulated product by adding a binder and an adhesion control agent to a fine powder made of a water absorbent resin. In this production method, the obtained fine powder granulated product is recovered in the drying step or in any step before the drying step.