The hard coupling device for mine flatbed trucks is ingeniously engineered to excel in the demanding and ever-changing conditions of underground tunnels. Whether navigating challenging inclines, steep declines, or sharp, unexpected turns, this cutting-edge solution outperforms traditional soft couplings in every aspect. It effectively prevents vehicle collisions during multi-vehicle transport operations, addressing and resolving pressing issues such as front lifting, rear compression, and the operational hazards that can arise during ascent, descent, and turning maneuvers. This revolutionary device guarantees seamless and safe transportation, setting an unprecedented standard for reliability and safety in the mining industry.