Abstract: In order to study the co-aging effect of various parameters of haze and corona discharge on composite insulator sheds, this paper uses a silicone rubber material as the test sample to carry out corona aging tests for different time periods in single haze, salt fog and haze environments. The flashover voltage, resistivity, hydrophobicity and leakage current of the aging test sample are evaluated and analyzed. The results show that the flashover voltage decreases with the increase of the aging time. The surface resistivity, volume resistivity and hydrophobic loss characteristics of the sample after aging have little to do with the aging environment. At the early stage of corona aging, the particle impact in the haze environment is the main reason for the destruction of the silicone rubber surface. At the later stage, the inorganic salt in the environment accelerates the corona aging, and the effect of ammonium sulfate is stronger than that of sodium nitrate. The research results can provide a theoretical basis for evaluating the service life of composite insulators in haze-prone areas and a reference for anti-haze and anti-pollution flashover of composite insulators.