The present invention discloses an insulator anti-pollution creepage extender. The creepage extender comprises an umbrella petticoat and a metal ring. The umbrella petticoat is a disc structure with a center hole, the outside diameter of the metal ring is smaller than the outside diameter of the umbrella petticoat, the umbrella petticoat and the metal ring are concentric circles, and the umbrella petticoat and the metal ring are bonded together. The silicone rubber umbrella petticoat is the main part of the creepage extender, used for increasing creepage distance of an insulator and supporting the metal ring. The metal ring has the function of improving electric potential and electric field distribution of insulator stings. The silicone rubber umbrella petticoat and the metal ring are bonded together via high-temperature-resistant instant glues. The insulator anti-pollution creepage extender has the capabilities of anti-pollution flashover and voltage equalization. The insulator anti-pollution creepage extender is cost-saving and has the functions of the creepage extender and a grading ring.