The　cable　accessory　insulation　is　affected　by　silicone　grease　swelling　for　a　long　time,　and　the　interface　between　cable　and　accessory　is　susceptible　to　creeping　corona　discharge.　However,　there　is　lack　research　on　the　effect　of　silicone　grease　swelling　with　corona　aging　on　properties　of　silicone　rubber　and　interfacial　charge　between　cross-linked　polyethylene(XLPE)　and　silicone　rubber(SR).　Therefore,　two　silicone　greases　with　similar　polarities　but　different　molecular　groups　were　selected　for　studying　the　change　rules　of　surface　morphology,　molecular　and　crosslinked　structure,　surface　trap　distribution　and　interfacial　charge　of　silicone　rubber　coated　with　different　silicone　greases　under　grease　swelling　with　corona　aging.　The　results　show　that　grease　swelling　with　corona　aging　makes　the　surface　cracks　and　the　cross-linked　structure　of　silicone　grease　and　rubber　destroyed.　Additionally,　the　shallow　trap　density　and　the　carrier　mobility　of　aged　silicone　rubber　increase.　Coated　with　grease　similar　to　molecular　group　of　silicone　rubber,　the　mobility　of　silicone　rubber　increases　more;　while　coated　with　grease　containing　alkanes,　cycloalkanes　and　aromatic　hydrocarbons,　the　silicone　rubber　is　oxidized　obviously　for　polar　groups　such　as　carbonyl　exist　in　its　infrared　spectra.　Moreover,　surface　polarity　and　bulk　conductivity　of　silicone　rubber　determine　the　polarity　and　decay　rate　of　interfacial　charge　of　aged　XLPE/SR　composite　sample.　The　silicone　rubber　coated　with　silicone　grease　containing　alkanes,　cycloalkanes　and　aromatic　hydrocarbons　has　larger　surface　polarity　and　its　residual　charge　decays　slowly,　while　the　silicone　rubber　coated　with　grease　similar　to　molecular　group　of　silicone　rubber　has　higher　conductivity　and　its　residual　charge　decays　fast.　©　2020,　High　Voltage　Engineering　Editorial　Department　of　CEPRI.　All　right　reserved.