The hard coupling device for mine flatbed trucks is meticulously engineered to conquer the demanding and ever-changing conditions of underground tunnels. Whether maneuvering through steep inclines, sharp declines, or tight turns, this cutting-edge solution outperforms traditional soft couplings in every scenario. It eradicates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving pivotal issues such as front lifting, rear compression, and operational hazards encountered during ascent, descent, and turning. This innovative device guarantees seamless and secure transportation, establishing an unparalleled benchmark of reliability and safety in the mining industry.