The invention relates to the field of metal alloy materials, in particular to a corrosion-resistant metal material. The metal material comprises, by weight, 2-5% of Al, 5-8% of C, 4-6% of Si, 1.0-1.5%of Mn, 3-6% of Mg, 2-5% of Cr, 0.15-0.25% of B, 0.01-0.03% of Zr, 0.03-0.05% of Nb and the balance Fe. During production, metals other than Fe, Zr and Nb are preheated and poured into a converter, after molten iron is added for smelting, Zr and Nb are added for refining, and after refining is completed, still standing, inoculation and casting forming are conducted. Iron is the main component of the material, as for other components, carbon is used for improving the strength and toughness of the material, silicon is used for deoxidation, manganese is used for improving the toughness of the material, zirconium and niobium are used for improving the corrosion resistance and strength of the material, through combination of various metal elements, the electrical conductivity, thermal conductivity and strength of the material are improved, the quenching property of the material is reduced, and the material is excellent in oxidation resistance, corrosion resistance, mechanical property and mechanical performance.