The identification card is made of environmentally friendly cross-linked polyolefin raw materials and designed according to the structural design of the identified product. It has a wide range of applications and can be used for the identification of large-sized cables in fields such as high-speed rail, subway, passenger cars, nuclear power plants, and aviation. It can be easily fixed and installed using cable ties, and can be easily removed for maintenance. The characters are highly reliable and can achieve permanent identification under service conditions.