Excellent　hydrophobicity　and　hydrophobicity　migration　property　of　silicone　rubber　material　guarantee　outstanding　pollution　resistance　and　insulation　performance　of　composite　insulators　in　outdoor　insulation.　Under　effect　of　multiple　environmental　factors,　insulators　get　aged　with　increase　of　service　duration.　In　this　paper,　hydrophobicity　recovery　characteristics　are　revealed　by　static　contact　angle　method　of　different　kinds　of　laboratory　aged　samples,　that　is,　corona　aged　and　salt　contaminated　HTV(high　temperature　vulcanized)　SR(silicone　rubber)　samples.　The　experimental　results　indicate　relationship　between　hydrophobicity　change　and　ageing　status　of　HTV　silicone　rubber.　At　last,　influencing　factors　of　static　contact　angle　method　and　problems　existing　are　discussed　when　the　method　is　applied　to　estimate　surface　condition　of　salt　contaminated　samples.