The hard coupling device for mine flatbed trucks is expertly crafted to excel in the rigorous and ever-changing environments of underground tunnels. Whether facing inclines, declines, or navigating sharp turns, this state-of-the-art solution outperforms traditional soft couplings by a significant margin. It proficiently eliminates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving pivotal issues such as front lifting, rear compression, and potential operational accidents that can occur during ascent, descent, and navigation of turns. This revolutionary device guarantees seamless, safe, and reliable transportation, establishing a new benchmark for excellence and dependability in the mining industry.