Engineered to perfection, the hard coupling device for mine flatbed trucks is designed to excel in the rigorous and ever-changing environments of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this cutting-edge solution outperforms traditional soft couplings, providing unparalleled reliability. It eradicates vehicle collisions during multi-vehicle transport operations and addresses crucial issues such as front lifting, rear compression, and operational accidents that can occur during ascending, descending, and turning. This device guarantees smooth and safe transportation, establishing a new benchmark for dependability in the mining industry.