Abstract: A possible rejuvenation method of a power cable insulated with (cross linked polyethylene) XLPE is presented. Samples with the shape of a film with a thickness of about 0.4mm was peeled from two retired 110 kV cables and their spare cable. First, the peeled samples were annealed at 85, 90, 95 and 100 ℃, respectively. Then, they were subjected to differential scanning calorimetry and DC current measurement. The DSC results revealed that as the annealing temperature increased from 85℃ to 95℃, the melting temperature increased, the melting peak width narrowed, and crystallinity and lamellae thickness increased, such changes reached the optimum status at an annealing temperature of 95℃. The results of the conduction current including the electrical conductivity and mobility decreased with increasing annealing temperature and reached their minimum value when the samples were annealed at 95℃. Overall, the melting temperature, crystallinity, lamellar thickness and electrical conductivity changed considerably at the optimum annealing temperature. The annealing process effectively improved the thermal and electric properties of the cables, that results is helpful for decisions regarding the continued use and prolonged the service years of the cables.