The hard coupling device for mine flatbed trucks is meticulously designed to excel in the demanding and ever-changing conditions of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this groundbreaking solution surpasses traditional soft couplings. It efficiently eradicates vehicle collisions during multi-vehicle transport operations, thereby tackling and resolving pivotal issues such as front lifting, rear compression, and operational mishaps that can occur during ascent, descent, and sharp turns. This state-of-the-art device guarantees uninterrupted and secure transportation, establishing a new benchmark for reliability and safety in the mining industry.