A composite hydrogel was synthesized in N,SN"-methyleneSbisacrylamide as cross linker,SPotassium persulfate as initiator, maleicSanhydride,acrylicSacid and acrylamide monomer co-polymerization cross-linking reaction add a certain percentage based on the β－cyclodextrin, synthetic β-cyclodextrin /(maleic acid-acrylic acid) composite hydrogel. Effects of pH value, adsorptionStime and contaminant initial concentration for safranin-t adsorption are investigated. The adsorption of composite hydrogel can reach 98% during the initial 15 min, and can achieve adsorption equilibrium within about 4 h. The composite hydrogel has certain effect in dealing with water pollution.