The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this innovative solution excels where traditional soft couplings falter. It effectively eradicates vehicle collisions during multi-vehicle transport operations, masterfully addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that are prevalent during ascent, descent, and turning. This state-of-the-art device ensures seamless and safe transportation, setting a new benchmark for reliability in the mining industry.