The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground mining tunnels. Whether navigating inclines, declines, or sharp turns, this state-of-the-art solution performs flawlessly where traditional soft couplings often fail. It effectively prevents vehicle collisions during multi-vehicle transport operations, resolving critical issues such as front lifting, rear compression, and potential operational accidents that can occur during ascents, descents, and turns. This revolutionary device ensures seamless and safe transportation, setting an unprecedented standard for reliability and safety in the mining industry.