Environmental protection material, waterproof insulation, heat shrinkable tube high temperature shrinkage material is environmentally friendly, with good wear resistance / corrosion resistance / waterproof performance; high strength and high temperature resistance, good insulation, cross-linked cable heat shrinkable terminal head double ground wire process. That is, the steel armored ground wire and the copper shielded ground wire are separated to make the cable head structure more reasonable; it is widely used in power cable terminal processing, transmission and distribution network infrastructure. Manufactured with ingenuity and high quality, the heat shrinkable straight tube has the characteristics of high temperature shrinkage, softness and anti-corrosion, which can effectively protect the safety.