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Cadmium is one of the most toxic elements for animals and humans, even at low concentrations.Separation of toxic Cd(Ⅱ) is of intense interest [1-3].Herein, a type of new Cd(Ⅱ)-imprinted functionalized silica gel was synthesized by a surface imprinting technique with N-[3-(trimethoxy-silyl)propyl]ethylenediamine and pyridine-2-carboxaldehyde as new monomers for selective separation of Cd(Ⅱ)from aqueous solution.Equilibrium-adsorption results showed that, in the presence of Cu(Ⅱ) or Zn(Ⅱ), the biggest selectivity coefficient of the imprinted sorbents for Cd(Ⅱ) was over 100, which is much higher than those of non-imprinted sorbents.