The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the arduous and ever-changing conditions of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this groundbreaking solution surpasses the limitations of conventional soft couplings. It adeptly prevents vehicle collisions during multi-vehicle transport operations, addressing and overcoming critical issues such as front lifting, rear compression, and operational mishaps that can occur during ascent, descent, and turning. This cutting-edge device guarantees flawless and safe transportation, elevating the standard of reliability to new heights in the mining industry.