In order to solve the problem of poor oxidation resistance of Cu-Ni-Fe inert anode at high temperature during aluminum electrolysis,Cu-20Ni-19Fe-xAl alloys (x=0%,6%,8%,10%) with different Al contents were prepared by vacuum melting method,and the alloys were used for the high temperature oxidation experiments which were carried out at 850 ℃ with oxygen partial pressure of 1.013×105 Pa and oxidation time of 100 h,and the effects of Al addition on the microstructure and high temperature oxidation properties of the alloy were investigated.The results show that the as-cast Cu-20Ni-19Fe alloy is composed of Ni/Fe-rich dendritic phase (γ1) and Cu/Ni-rich matrix phase (γ2);Al was dissolved in the Cu-20Ni-19Fe alloy matrix with 6% content of Al added;The needle-like or blocky NiAl phase was formed in the microstructure of Cu-20Ni-19Fe alloy with 8% and 10% Al added;The content of NiAl phase increases with the increasing addition of Al;The oxidation kinetics of Cu-20Ni-19Fe alloy follow the straight line under 850 ℃ and oxygen partial pressure of 1.013×105 Pa;After the addition of Al,the oxidation kinetic curve of Cu-20Ni-19Fe-xAl alloy follow an exponential law,and the oxidation rate index of the Cu-20Ni-19Fe-xAl alloy was much smaller with more content of Al.The high-temperature oxidation resistance of Cu-20Ni-19Fe alloy was greatly improved by the addition of Al,which proves the Cu-20Ni-19Fe alloy may be used as an alternative anode material for aluminum electrolysis.