The embodiment of the invention discloses a direct-current disc-shaped suspension-type porcelain and glass insulator for a metal-ware corrosion extreme region. The insulator comprises a steel foot (11), cement (12), a zinc protective sleeve (13) and an organic protective sleeve (41); the upper surface of the organic protective sleeve (41) makes contact with junctions of the zinc protective sleeve (13) and the cement (12), the two sides of the inner ring surface of the organic protective sleeve (41) are tightly attached to the zinc protective sleeve (13), the inner ring surface, making contact with an umbrella-shaped thickening type zinc sleeve (42), of the organic protective surface (41) is inclined, the inclined angle of the inner ring surface is the same as an umbrella cover angle of the umbrella-shaped thickening type zinc sleeve (42), and the inner ring surface of the organic protective sleeve (41) and the outer surface of the zinc protective sleeve (13) are bonded in a smoothly transitional mode; the zinc protective sleeve (13) and the organic protective sleeve (41) are both arranged on the steel foot (11), so that a corrosion portion is transferred from a junction, bearing mechanical stress, of the steel foot (11) and the cement (12) to an exposed portion, not bearing the mechanical stress, of the zinc protective sleeve (13), the degradation of bonding characters between adhesives of the zinc sleeve and the cement (12) is avoided, and the mechanical strength of the insulator is guaranteed.