Cu/(10NiO-90NiFe2O4) cermet inert anodes with metal Cu content of 0,5,10,15 and 20% were prepared and their corrosion behavior in Na3AlF6-Al2O3 melts was investigated in laboratory electrolysis tests. The results indicate that the content of metal Cu in anodes had little effects on the steady-state concentrations of Ni in electrolyte, the concentration of Fe decreases from 304ppm to 206ppm and that of Cu increases from 21ppm to 70ppm with the content of metal Cu increasing from 0 to 20%. Considering the corrosion resistance, among NiFe2O4 based cermet anodes with different content of metal Cu, 5Cu/(10NiO-90NiFe2O4) cermet behaves best and should be further studied. Post-examination shows that metal Cu at the anode surface is oxidized, which improve its corrosion resistance, and doesn’t leach preferentially during electrolysis.