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, sharp declines, or tight turns, this cutting-edge solution outperforms traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This device ensures seamless and safe transportation, setting a new benchmark for reliability and safety in the mining industry.