The hard coupling device for mine flatbed trucks is meticulously engineered to withstand the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or intricate turns, this state-of-the-art solution transcends the limitations of traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, adeptly tackling and resolving critical issues such as front lifting, rear compression, and potential operational accidents during ascent, descent, and turning. This device guarantees seamless and safe transportation, elevating the standards of reliability and efficiency in the mining industry.