The　cable　joint　interface　is　highly　susceptible　to　discharge　along　the　face,　which　becomes　the　weakest　link　in　power　cable　systems.　In　this　paper,　the　effects　of　different　interface　roughness,　pressure　and　temperature　on　the　AC　breakdown　voltage　at　the　silicone　rubber/polyethylene　double-layer　dielectric　interface　are　investigated,　and　the　interface　discharge　channels　after　breakdown　are　analyzed.　The　results　show　that　the　interface　breakdown　voltage　at　room　temperature　is　related　to　the　interface　gap　size.　The　larger　the　gap　size,　the　lower　the　interface　breakdown　voltage,　and　the　larger　the　interface　charging　area.　With　the　increase　of　temperature,　the　interfacial　breakdown　voltage　decreases　initially.　However,　with　temperature　further　increasing,　the　breakdown　voltage　does　not　decrease　significantly.　In　addition,　the　carbonized　area　shows　a　trend　of　first　increasing　and　then　decreasing　with　the　increase　of　temperature.　The　interface　state　and　temperature　of　cable　accessories　have　a　significant　impact　on　the　interface　breakdown　characteristics,　which　should　be　paid　attention　to　during　cable　operation　and　maintenance.　©　2023,　Beijing　Paike　Culture　Commu.　Co.,　Ltd.