The hard coupling device for mine flatbed trucks is ingeniously engineered to excel in the demanding and dynamic conditions of underground tunnels. Whether navigating steep inclines, challenging declines, or sharp, twisting turns, this cutting-edge solution outperforms where traditional soft couplings often fail. It proficiently eliminates 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 state-of-the-art device guarantees seamless and safe transportation, setting a new benchmark for reliability and safety in the mining industry.