The invention discloses a metal/polymer compound powder core wire material, a metal/polymer compound coating and a preparation method thereof. The metal/polymer compound powder core wire material sequentially comprises a metal band, a middle layer and a powder core, wherein the metal band and the middle layer coated on the surface of the metal band form an outer cover covering the powder core; andthe filling rate of the powder core is 5 to 45 percent. The metal/polymer compound coating comprises metal and a polymer, wherein the volume fraction of the metal is 50 to 95 percent; the volume fraction of the polymer is 5 to 50 percent; and the metal/polymer compound coating is formed by spraying and depositing the metal/polymer compound powder core wire material onto a base body. The metal/polymer compound coating provided by the invention can be favorably combined with the base body, and the polymer is uniformly distribute in the whole coating, so that the metal/polymer compound coating has excellent corrosion resistance and can be applied to outer surfaces of multiple industrial parts for sea and other occasions requiring corrosion resistance.