The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or tight turns, this groundbreaking solution outperforms traditional soft couplings, which often falter in such demanding environments. By effectively eliminating vehicle collisions during multi-vehicle transport operations, this device addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning maneuvers. This innovation ensures seamless, safe, and efficient transportation, setting an unprecedented standard for reliability and safety in the mining industry.