The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and ever-changing conditions of underground tunnels. Whether maneuvering through inclines, declines, or navigating sharp turns, this state-of-the-art solution surpasses the capabilities of traditional soft couplings. It eradicates vehicle collisions during multi-vehicle transport operations, effectively addressing and mitigating critical issues like front lifting, rear compression, and operational accidents that typically occur during ascent, descent, and turning. This revolutionary device ensures uninterrupted and safe transportation, setting an unprecedented standard of reliability and efficiency in the mining industry.