The invention discloses paint for aircraft stealth and a preparation method thereof. The paint is prepared from the following raw materials: hydroxylated acrylic resin, polyurethane, water-based acrylic resin, nickel powder, isophorone diisocyanate, zinc powder, triethanolamine, zinc chromate, triethylamine, ammonia water, zinc oxide, zirconium oxide, iron oxide red and a thickening agent; the paint can be used for resisting ultrahigh-frequency and high-strength radar detection and has good electromagnetic parameters; the density of a coating is 0.1g / cm<3>-0.5g / m<3>; the electric conductivity is 0.01W / m.k-0.016W / m.k, and the heat insulation performance is good; the surface is dried at 25 DEG C after 10min-50min, and the paint is completely dried after 4h-8h; a coated film is flat and smooth and has the effects of resisting humidity, atmosphere, acid rain, seawater and salt-fog corrosion; the rigidity is 6H-10H; and the paint has high adhesion force, impact resistance and good abrasion, can be widely produced and can continuously replace an existing material.