The hard coupling device for mine flatbed trucks is meticulously engineered to dominate the demanding and ever-changing environment of underground tunnels. This groundbreaking solution stands unmatched, effortlessly handling inclines, declines, and sharp turns where conventional soft couplings fail. It eradicates vehicle collisions during multi-vehicle transport operations, effectively tackling and resolving critical concerns such as front lifting, rear compression, and operational mishaps that typically occur during ascents, descents, and turns. This device guarantees smooth, safe, and seamless transportation, establishing a new benchmark for reliability and safety in the mining industry.