Low smoke halogen free wires and cables produce very little smoke in the case of flame combustion, and the released gas does not contain halogen elements, is non-toxic, and meets the European fire protection standard of EN45545-2. When a fire occurs, it can greatly reduce the damage to instruments, equipment and human body. Hazard, widely used in high-rise buildings, hospitals, large libraries, gymnasiums, disaster prevention command and dispatch buildings, stations and civil airports, passenger waiting rooms, key cultural relics protection sites, and subways, underground shopping malls or densely populated public places.