The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, steep declines, or sharp turns, this state-of-the-art solution outperforms traditional soft couplings, ensuring unparalleled operational efficiency and safety. It effectively eliminates the risk of vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This groundbreaking device guarantees seamless and safe transportation, setting an unprecedented standard for reliability in the mining industry.