The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this state-of-the-art solution surpasses traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations and addresses critical issues like front lifting, rear compression, and operational accidents during ascent, descent, and turning. This innovative device ensures seamless and safe transportation, setting an unparalleled standard for reliability and safety in the mining industry.