The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the harsh and dynamic environment of underground tunnels. Whether tackling inclines, declines, or sharp turns, this groundbreaking solution outperforms traditional soft couplings. It proficiently eradicates vehicle collisions during multi-vehicle transport operations, addressing and resolving pivotal issues like front lifting, rear compression, and operational accidents that frequently occur during ascent, descent, and turning maneuvers. This pioneering device ensures seamless and safe transportation, establishing a new benchmark for reliability in the mining industry.