The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this cutting-edge solution surpasses traditional soft couplings. It effectively prevents vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that typically occur during ascent, descent, and turning. This revolutionary device ensures smooth and safe transportation, establishing a new benchmark for reliability and operational excellence in the mining industry.