Chassis wiring harness protective covers protect vehicle chassis wiring harnesses from stone impact, dust and moisture erosion, requiring high toughness, wear resistance and sealing performance. Traditional mechanical bundling has gaps and poor protection effect, easy damage to wiring harnesses. DaokeDao laser welding realizes seamless connection of protective covers, suitable for PP and PE materials, with high weld toughness, resisting stone impact and friction without cracking. The sealed structure blocks dust and moisture, effectively protecting the wiring harness, extending its service life. The welding process is efficient, adapts to long strip-shaped protective cover welding, with consistent quality, suitable for mass production of wiring harness suppliers. Compared with traditional processes, it improves protection performance by 40%, reducing vehicle chassis circuit failures and improving vehicle reliability.