Abstract: Selective adsorbent resin comprising of bentonite/sodium lignosulfonate graft-polymerized with acrylamide and maleic anhydride(Ben/LS-g-AM-co-MAH) was prepared by free radical graft solution copolymerization method by using sodium lignosulfonate(LS), acrylamide(AM) and maleic anhydride(MAH) as raw materials, bentonite as inorganic filler, potassium peroxydisulfate(KPS) as initiator, N, N'-methylene-bis-acrylamide(NMBA) as crosslinker. The as-prepared adsorbent resin was characterized by elemental analysis(EA), specific surface area and pore size analysis(BET), FTIR, nuclear magnetic resonance spectrum(¹³C NMR), XRD, SEM-EDS and XPS. The results show that there are a large number of acrylamide and carboxyl groups in the structure of Ben/LS-g-AM-co-MAH and the adsorbent resin possesses high adsorption capacity and selectivity to Pb²⁺ in Pb²⁺/Cu²⁺ binary solution.