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, sudden declines, or sharp turns, this innovative solution outperforms traditional soft couplings. It ensures seamless and safe transportation by effectively eliminating vehicle collisions during multi-vehicle transport operations. This advanced device addresses and resolves critical issues such as front lifting, rear compression, and operational accidents commonly occurring during ascent, descent, and turning. Setting a new benchmark for reliability in the mining industry, it guarantees unparalleled safety and efficiency.