The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. This innovative solution thrives where traditional soft couplings falter, ensuring optimal performance whether navigating inclines, declines, or sharp turns. By effectively eliminating vehicle collisions during multi-vehicle transport operations, it addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This cutting-edge device guarantees seamless and safe transportation, setting an unparalleled standard for reliability in the mining industry.