Abstract: The effect of MgO promoter on the physico-chemical properties and catalytic performance of Mg-Ni/ BaTiO3 catalyst for CH4/CO2 reforming to syngas were studied with H2-TPR，BET and XRD. It was found that Mg-Ni/ BaTiO3 catalyst with a proper amount of MgO promoter showed higher catalytic activity and stronger resistance to carbon deposition than Ni/ BaTiO3 and Ni/γ-Al2O3. However，excessive MgO promoter exerted a negative effect on catalyst performance，with increasing content of MgO，the reactivity of catalysts decreased. The effect of preparation methods on catalytic activity was also studied，and the results showed that the catalytic activity of catalyst prepared by the sol-gel method was higher than that by the impregnation method.