The hard coupling device for mine flatbed trucks is ingeniously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or tight turns, this cutting-edge solution outperforms traditional soft couplings by a wide margin. It meticulously eliminates vehicle collisions during multi-vehicle transport operations, effectively tackling and resolving critical problems such as front lifting, rear compression, and accidents that can occur during ascent, descent, and turning. This groundbreaking device ensures seamless and safe transportation, setting an unprecedented standard for reliability in the mining industry.