The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the demanding and dynamic conditions of underground tunnels. Expertly designed for traversing inclines, declines, and sharp turns, this groundbreaking solution surpasses traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, addressing and resolving pivotal issues such as front lifting, rear compression, and operational mishaps that occur during ascent, descent, and turning. This device guarantees seamless and secure transportation, establishing a new benchmark for reliability and safety in the mining industry.