A layered oxide material, a preparation method, an electrode, a secondary battery and use are disclosed. The layered oxide material has a general chemical formula NaxCuiFejMnkMyO2+β, in which M is an element that is doped for replacing the transition metals; x, y, i, j, k, and β are respectively the molar ratios of respective elements, provided that x, y, i, j, k, and β satisfy the relations: y+i++j+k=1, and x+my+2i+3j+4k=2(2+β), where 0.8≦x≦1, 0<i≦0.3, 0<j≦0.5, 0<k≦0.5, 0.02≦β≦0.02, and m is the valence of M. The layered oxide material has a space group of R3m.