The hard coupling device for mine flatbed trucks is expertly engineered to perform exceptionally in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or acute turns, this cutting-edge solution triumphs where traditional soft couplings falter. It efficiently eradicates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents during ascent, descent, and turning. This device ensures seamless and safe transportation, setting an unparalleled standard for reliability in the mining industry.