The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the rigorous and dynamic conditions of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this cutting-edge solution significantly outperforms traditional soft couplings. By effectively eliminating vehicle collisions during multi-vehicle transport operations, it addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This advanced device guarantees seamless and safe transportation, setting an unprecedented standard for reliability and performance in the mining industry.