The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether confronting steep inclines, sharp declines, or tight turns, this cutting-edge solution outperforms traditional soft couplings by a significant margin. It effectively negates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps that often occur during ascent, descent, and turning maneuvers. This advanced device guarantees seamless and secure transportation, setting an unparalleled standard for reliability and safety in the mining industry.