In case of low temperature environment

the insulation materials of cable such as cross-linked polyethylene and rubber increase in brittleness

and are likely to the risk of crack due to external force during the laying process and threaten the safe operation of the cable. In this paper

a low-temperature environment cooling model and a trailer heating and insulation model of cable are set up on the basis of a tray-forming cable heating and insulation trailer

the insulation effect of the insulated trailer under different conditions is calculated and analyzed and more-over

the temperature rise and fall of cable is experimentally verified. The results show that in order to meet the requirements of laying standards

the temperature of cable shall not be lower than 20 ℃ before leaving the vehicle. The simulation calculation and experimental verification results of the cable heating and cooling process are consistent with the temperature change trend

proving the accuracy of the simulation model and results. Both the driving and parking heating modes of the insulated trailer can provide excellent insulation for the disk cables. Heating insulation trailer

compared to the traditional into the disc cable heating insulation measures

has better insulation effect and higher flexibility

which reduces the cost of cable laying in winter and provides a new direction for the development of heating insulation measures of cable in winter.