The super-hydrophobic coating has excellent hydrophobicity and self-cleaning property. Therefore,it has a broad application prospect in the field of anti-pollution flashover. In order to study the application effects of superhydrophobic coating in special industrial dust area,the super-hydrophobic coating provided by a domestic enterprise is selected,and the super-hydrophobic coating insulator and the same type of uncoated composite insulator are used in Xiangshui,Jiangsu Province. The contamination accumulation characteristics of the super-hydrophobic coating,the aging properties of coating and the protective performance of the coating to silicone rubber are analyzed through the contamination level test,hydrophobicity test and microscopic test. The results show that the surface contamination amount of super-hydrophobic coating insulator is reduced by 37% compared with ordinary silicone rubber insulator. Although the super-hydrophobic coating ages after running for 10 months,the coating plays a good protective role on the internal silicone rubber material and effectively prevents the internal material from aging.