Abstract: In this paper, the reaction activity of impregnated microspheroidal CuCl₂/Al₂O₃ catalyst using in oxygen based ethylene oxychlorination to prepare ethylene dichloride was studied. XRD, TPR and pulse reaction technique proved that the impregnated catalyst has identical active phase of CuCl₂ with commercial coprecipitated catalyst,though the copper present in the later at first is in the form of Cu₂(OH)₃Cl, but it changes into CuCl₂ by HCl which is presented in the reacting gas as the oxychlorina-tion takes place. The copper content and its state of distribution on the surface of γ-Al₂O₃ car-rier appear important in the activity development of the catalyst. They also show a serious influence on the fluidity in fluidized bed reaction. The impregnated catalyst is simple to prepare and its cost is low. Catalyst with 9%(wt) copper content may be used instead of the coprecipitated catalyst having 13% (wt) of copper.