The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the rigorous and dynamic conditions of underground tunnels. Whether traversing inclines, declines, or navigating sharp turns, this state-of-the-art solution delivers unmatched performance where traditional soft couplings falter. It proficiently eliminates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that typically arise during ascent, descent, and turning. This innovative device guarantees seamless and secure transportation, setting an unprecedented standard for reliability in the mining industry.