Abstract: The anti-pitting corrosion,anti-stress corrosion and high temperature anti-oxidizing properties of ferritic stainless steels(11%～30%Cr)are better than that of austenitic stainless,but normal feritic stainless steels have higher intergranular corrosion sensitivity, lower plasticity and toughness,and greater tendency to welding crack. It is obtained by analysis that addition of rare earth elements in feritic stainless steels may improve solidification structure of steel,effect precipitating morphology of carbon-nitride,fine grain size,change morphology of sulphide and composition of inclusion in steel,in order to improve transverse toughness of steel, weldability and fatigue property. Therefore the research work of ap- plication for rare earth elements adding in ferritic stainless steel has promising prospect.