The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and ever-changing conditions of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this cutting-edge solution surpasses traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport, expertly addressing and resolving critical issues such as front lifting, rear compression, and potential operational accidents during ascent, descent, and turning. This device guarantees seamless and safe transportation, establishing an unprecedented standard of reliability in the mining industry.