MgO/13X，Fe2O3/13X and MgO⁃Fe2O3/13X were prepared by impregnation method using 13X molecular sieve as carrier and MgO and Fe2O3 as active components. The structure of the prepared adsorbent was analyzed by XRD，N2 adsorption⁃desorption，TG⁃DTA and other characterization techniques, and the dechlorination effect of the adsorbent on naphtha was investigated. The results show that the metal oxides such as MgO and Fe2O3 are uniformly supported on 13X，the specific surface area and pore size of the modified adsorbent are slightly increased，and the pore volume is decreased. By comparison，the dechlorination effect of MgO⁃Fe2O3/13X adsorbent is best. The optimum conditions were as follows：adsorption time 2 h，adsorption temperature 60 ℃, and ratio of solvent to oil 1∶40，the dechlorination rate was the highest，reaching 89%. The fitting results show that the adsorption process conforms to the quasi⁃secondary kinetic model，mainly the physical adsorption proces.