Abstract: Al-pillared montmorillonite was prepared by using the artificial Na-montmorillonite,its adsorption behavior was studied by experiments,the results showed the Al-pillared montmorillonite exhibited much stronger adsorption capacity on the Cr⁶⁺ in aqueous solution than untreated clay,and the adsorption isotherm of the material to Cr⁶⁺ from aqueous solution was keeping with the Langmuir equation.