The stability and the high temperature steam resistance of Ni/Al2O3 catalysis added with rare earth oxides were investigated. It was found that the addition of rare earth oxides resulted in great improvement in the stability and high temperature steam resistance of the catalysts through suppressing the growth of Ni crystallite, the oxidation of metal Ni and the formation of NiAl2O4. The stability and the high temperature steam resistance of Ni / Al2O3 catalysis added with rare earth oxides were investigated. It was found that the addition of rare earth oxides were resulted in great improvement in the stability and high temperature steam resistance of the catalysts through suppressing the growth. of Ni crystallite, the oxidation of metal Ni and the formation of NiAl2O4.