Aging-resistant ceramic insulator and preparation method thereof

The invention discloses an aging-resistant ceramic insulator. The aging-resistant ceramic insulator comprises a zirconium oxide substrate, and the zirconium oxide substrate is provided with an adsorption layer with a thickness of 2-4 mm, a hydrophobic layer with a thickness of 1-3 mm, and a light reflecting layer with a thickness of 1-2 mm from the inside to the outside in sequence; the adsorptionlayer comprises the following raw materials, in parts by weight: 20-30 parts of organosilane, 1-3 parts of a dispersant, 5-10 parts of oyster shell powder, 1-5 parts of n-butyl acetate, and 50-100 parts of a solvent A; and the light reflecting layer comprises the following raw materials, in parts by weight: 5-10 parts of glass microbeads, 1-5 parts of titanium dioxide, and 50-100 parts of a solvent B. The invention also discloses a preparation method of the aging-resistant ceramic insulator. The method provided by the invention effectively reduces an accumulation amount of dirt on the surfaceof the insulator, and imp