A superabsorbent polymer includes polymer particles, surface cross-linking agents and an extract of a plant of Sapindaceae. The polymer particles have cross-linking inside the polymer particles. The surface cross-linking agents are covalently bound to the surface of the polymer particles, and the extract of the plant of Sapindaceae covers the surface of the polymer particles.一種吸水性樹脂,其包括樹脂顆粒、表面交聯劑以及無患子科萃取物。其中,各樹脂顆粒係具有內部交聯結構,表面交聯劑鍵結於各樹脂顆粒的表面,且無患子科萃取物覆蓋住各樹脂顆粒的表面。