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 innovative solution surpasses the limitations of traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, providing a robust solution to critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. By ensuring seamless and safe transportation, this device sets a new benchmark for reliability and safety in the mining industry.