The hard coupling device for mine flatbed trucks is masterfully engineered to excel in the rigorous and fluctuating conditions of underground tunnels. Whether it's conquering inclines, handling declines, or navigating sharp turns, this cutting-edge solution surpasses traditional soft couplings in every aspect. It proficiently eradicates vehicle collisions during multi-vehicle transport, effectively addressing and mitigating critical issues such as front lifting, rear compression, and operational accidents that can arise during ascent, descent, and turning maneuvers. This device guarantees smooth and safe transportation, establishing a new benchmark for reliability and performance in the mining industry.