With the global warming, the extreme weather with high temperature has obviously increased, which poses new challenges to the high temperature resistance requirements of power equipment and power supporting components. With the increasing load of electrical lines, some transformers, meter boxes and switch cabinets frequently have fire accidents, and the fire hazard of power equipment can not be ignored. Our company has developed and produced heat-resistant and heat-shrinkable tubes with a temperature of 150℃, which is higher than the ordinary 125℃, and can be used as supporting components of power equipment in tropical climate and important places. The test data show that the product has excellent high temperature resistance and does not affect the insulation and cracking resistance.