The hard coupling device for mine flatbed trucks is meticulously engineered to outperform in the challenging and dynamic conditions of underground tunnels. Navigating inclines, declines, or sharp turns with unparalleled precision, this cutting-edge solution surpasses the limitations of traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, adeptly addressing critical issues such as front lifting, rear compression, and operational accidents during ascent, descent, and turning. This remarkable device ensures seamless and safe transportation, setting a new benchmark for reliability in the mining industry.