The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or intricate turns, this groundbreaking solution outperforms traditional soft couplings. By effectively eliminating vehicle collisions during multi-vehicle transport operations, it adeptly resolves critical issues such as front lifting, rear compression, and operational mishaps that can occur during ascents, descents, and turns. This device guarantees seamless and secure transportation, thereby establishing a new benchmark for reliability and safety in the mining industry.