Introducing a revolutionary hard coupling device specifically designed for mine flatbed trucks, engineered to excel in the rigorous and ever-changing conditions of underground tunnels. This cutting-edge solution is unparalleled in its ability to navigate inclines, declines, and sharp turns, outperforming traditional soft couplings. It virtually eliminates the risk of vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that commonly occur during ascent, descent, and turning. This remarkable device guarantees seamless and safe transportation, establishing an unprecedented standard for reliability and safety in the mining industry.