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