Epoxy-mica　stator　insulation　system　is　one　of　the　most　important　parts　of　generator.　In　most　cases　the　reliability　and　residual　life　of　generators　greatly　depend　on　the　condition　of　stator　insulation.　A　accelerated　aging　test　was　conducted　on　epoxy-mica　insulation　under　electrical-thermal　stress　and　thermal-mechanical　stress.　In　the　period　of　aging,　dynamic　mechanical　analysis　was　employed　to　investigate　the　aging　characteristics　of　insulation　materials.　The　test　results　show　that　the　trend　of　dynamic　mechanical　properties　is　fairly　consistent　with　that　of　dielectric　dissipation.　Accordingly,　the　dynamic　mechanical　properties　can　be　used　to　describe　the　aging　characteristics　of　stator　insulation　epoxy-mica.