Magnetic poly(acrylate methyl ester) resin (RM) was prepared by suspension polymerization using N,N'-methylenebisacrylamide as a crosslinker. Then RM was modified with ethylenediamine to give a novel amine-chelating magnetic resin(RMA). This adsorbent was characterized by thermal analysis (DTA/TGA) and FT-IR. The adsorption behaviour of the adsorbent toward Cu ²⁺ ions was investigated. The results show that the diameter of RMA is 30~60 μm and the mass fraction of Fe ₃O ₄ is 6.7%. The isotherm adsorption data obeyed the Langmuir model. In the aspect of maximum adsorptiom capacity, RMA displayed higher (2.13 mmol/g) for Cu ²⁺ than that of RM (1.15 mmol/g). Kinetics studies indicate that the adsorption reaction followed the pseudo-second order kinetics. Thermodynamic analysis indicates that the adsorption process was spontaneous, and that the value of enthalpy changes was -17.88 kJ/mol, the entropy changes was -2.06 J/(mol· K) and the Gibbs free energy was -17.26~ -17.19 kJ/mol. Regeneration of the adsorbent was achieved using 1 mol/L HCl with the desorption ratio of more than 97%.