A method for surface crosslinking water-absorbing resin of the present invention includes a step (1) of obtaining a wet mixture, a step (2) of obtaining a dried particulate composition, and a step (3) of carrying out a surface crosslinking reaction. With this, since a processing time of each step becomes short, it is possible to mass produce the water-absorbing resin having excellent physical properties. Moreover, a method for manufacturing the water-absorbing resin of the present invention includes a modifying step and a cooling step. The modifying step and/or the cooling step are/is carried out by using stirring means including a rotation axis (70) having a plurality of stirring boards (80b), and the stirring means includes the stirring board (90b) having a specific thickness and/or a scraping blade having a specific shape. With this, it is possible to suppress the generation of the fine powder in the modifying step and/or the cooling step.本發明之吸水性樹脂之表面交聯方法,包含:得到濕潤混合物之步驟(1)、得到乾燥粒子狀組合物之步驟(2)及進行表面交聯反應之步驟(3)。藉此,由於完成各步驟之處理時間短,可大量生產物性良好之吸水性樹脂。又,本發明之吸水性樹脂之製造方法包含改質步驟及冷卻步驟,上述改質步驟及/或冷卻步驟係使用具有具備複數個攪拌盤之回轉軸之攪拌機構而進行,上述攪拌機構具備具有特定厚度之攪拌盤及/或具有特定形狀之翻攪葉片。藉此,可抑制改質步驟及/或冷卻步驟中微粉之產生。
