The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and turbulent conditions of underground tunnels. Whether tackling steep inclines, declines, or navigating sharp turns, this cutting-edge solution outperforms traditional soft couplings. It eradicates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps that occur during ascent, descent, and turning. This device guarantees seamless and safe transportation, establishing an unparalleled standard of reliability in the mining industry.