The hard coupling device for mine flatbed trucks is meticulously engineered to thrive under the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, abrupt declines, or sharp turns, this revolutionary solution surpasses the limitations of traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, adeptly addressing and resolving critical issues such as front lifting, rear compression, and operational accidents during ascents, descents, and turns. This exceptional device guarantees seamless and secure transportation, establishing an unparalleled standard of reliability and efficiency in the mining industry.