In the winter in the north of China, everywhere ice and snow, the temperature is very low, crosslinked polyethylene insulated power cable is generally laid in the indoor, tunnel and pipeline, vulnerable to the influence of external low temperature weather, the outer sheath of the cable is easy to freeze and become hard and brittle, serious cracking, cable damage, damage power transmission, resulting in a large area of power outage, which has a great impact on people's quality of life. However, t