The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and dynamic environment of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this state-of-the-art solution outperforms traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, comprehensively addressing critical issues such as front lifting, rear compression, and operational accidents occurring during ascent, descent, and turning. This device guarantees seamless and safe transportation, establishing an unprecedented standard for reliability in the mining industry.