High-voltage　cables　are　widely　used　in　the　transmission　of　electric　power.　However,　cable　accessories,　as　an　important　part　of　power　cables,　have　frequent　failures.　Due　to　the　different　materials　of　cable　main　insulation　and　accessory　insulation　of　cable,　interfacial　breakdown　often　occurs　at　the　interface　of　the　double-layer　dielectric.　In　this　paper,　the　changes　in　interfacial　breakdown　voltage　under　different　temperatures　are　analyzed.　At　the　same　time,　the　interfacial　resistivity　of　SiR/XLPE　under　different　temperatures　is　tested　by　using　a　four-electrode　test　system.　With　the　increase　in　temperature,　both　the　interfacial　breakdown　voltage　and　the　interfacial　resistivity　show　a　trend　of　first　decreasing　and　then　increasing.　Moreover,　through　the　analysis　of　XLPE　interfacial　breakdown　channels　at　different　temperatures,　it　is　found　that　interfacial　carbonization　also　shows　a　trend　of　increasing　first　and　then　decreasing.　©　2023　IEEE.