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, declines, or sharp turns, this state-of-the-art solution surpasses traditional soft couplings, which often fail under such conditions. It proficiently eradicates vehicle collisions during multi-vehicle transport operations, skillfully addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that frequently occur during ascent, descent, and turning. This device ensures seamless, secure, and efficient transportation, thereby setting a new benchmark for reliability and safety in the mining industry.