The environmental protection requirements for connecting wires have shifted from "post-treatment" to "material-manufacturing-disposal" full lifecycle control. Firstly, at the raw material end, it is necessary to comply with regulations such as RoHS and REACH. The content of ten hazardous substances, including lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls and their ethers, must not exceed 0.1%, and persistent organic pollutants such as asbestos, short-chain chlorinated paraffins, and polychlorinated biphenyls must not be intentionally added. For wire harnesses that may come into contact with children's toys, medical devices, or food equipment, they must also pass EN 71-3 soluble heavy metal migration and FDA food-grade testing to ensure that they do not release toxic ions in saliva, sweat, or oil environments. Secondly, insulation and sheath materials should preferably be low smoke zero halogen (LSZH) flame retardant polyolefins or thermoplastic polyurethane, with a halogen acid gas release of ≤5 mg/g during combustion, a smoke density light transmittance of ≥60%, a pH value of ≥4.3, and a conductivity of ≤10 μS/mm, thus avoiding the hazard of "secondary toxic smoke" in fires and ensuring fire visibility. Thirdly, the manufacturing process requires the use of lead-free soldering, water-based cleaning agents, and low VOC inks. The factory exhaust gas must undergo activated carbon adsorption-catalytic combustion, with non-methane total hydrocarbons ≤20 mg/m³, and the wastewater heavy metal emissions must meet the special emission limits in Table 3 of GB 21900-2008, achieving clean production. Fourthly, the product structure needs to follow an easy-to-disassemble design, with metal conductors and plastic sheaths mechanically separable. The plastic part should consist of ≥90% single material, and recycling labels should be marked for easy entry into the recycling system. The use of PVC and nylon multilayer co-extrusion non-peelable structures is prohibited to prevent long-term leaching of plasticizers and lead salts into soil and groundwater after burial. Finally, during the entire machine scrap stage, connecting wires should pass the recycling rate verification of the WEEE directive, with ≥65% of the material being recyclable, and no persistent carcinogens such as dioxins should be produced during the recycling process. At the same time, a disassembly manual should be provided to guide downstream enterprises in separately sending copper and aluminum conductors and plastic particles to metallurgical and modified granulation closed loops, achieving "cable-metal-plastic" re-use at the same level, truly completing the closed-loop management from green design to green recycling.