Insulator is a special insulation control, which can play an important role in overhead transmission lines. In the early years, insulators were mostly used for power poles, and gradually developed into high-voltage power lines. Many disc-shaped insulators were hung at one end of the connecting tower to increase the creepage distance. They are usually made of glass or ceramics, which is called insulators. The insulator should not fail due to various mechanical and electrical stresses caused by the change of environment and electric load conditions, otherwise the insulator will not play a significant role and will damage the service life of the whole line.