In　this　work,　the　electric-thermal　effect　of　a　carbon-fibre-reinforced　epoxy　composite　(CFRE)　panel　was　studied,　as　well　as　the　influence　of　the　electric　heating　treatment　on　the　mechanical　properties　of　the　composite.　It　was　observed　that　the　temperature　of　the　composite　increased　rapidly　once　the　current　was　loaded,　and　the　equilibrium　surface　temperature　was　reached　within　2　min.　The　electric-thermal　effect　and　mechanical　properties　depended　on　both　the　current　loading　time　and　the　current　intensity.　At　5A,　the　flexural　modulus　and　strength　of　the　CFRE　increased　before　decreasing　with　the　current　loading　time.　Under　the　same　treatment　time,　the　flexural　strength　of　the　samples　treated　with　5A　was　evidently　larger　than　that　under　the　small　current,　and　all　the　treated　samples　displayed　enhanced　flexural　strength　compared　to　that　of　untreated　samples.　The　results　depicted　that　the　low-current　treatment　and　short　time　could　improve　the　interfacial　properties　between　CF/epoxy,　along　with　enhancing　the　flexural　properties　of　the　samples.　However,　a　large　amount　of　the　joule　heating　from　the　larger　current　and　a　more　extensive　time　frame　is　predicted　to　cause　irreversible　defects　to　the　composite,　which　consequently　leads　to　the　reduction　in　flexural　strength　of　the　composite.　TGA　results　indicated　decreased　thermal　stability　of　the　CFRE　composite　panels　after　the　electric　heating　treatment　was　applied.