The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the rigorous and ever-changing conditions of underground tunnels. Whether negotiating steep inclines, sharp declines, or tight turns, this cutting-edge solution surpasses traditional soft couplings in performance. It proficiently eliminates vehicle collisions during multi-vehicle transport operations, tackling critical challenges such as front lifting, rear compression, and operational accidents that commonly occur during ascent, descent, and turning. This revolutionary device guarantees seamless and safe transportation, establishing a new benchmark for reliability and efficiency in the mining industry.