The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating the steep inclines, sharp declines, or tight turns, this innovative solution outperforms traditional soft couplings by leaps and bounds. It effectively prevents vehicle collisions during multi-vehicle transport operations, tackling and resolving critical issues such as front lifting, rear compression, and operational accidents that frequently occur during ascent, descent, and turning. This cutting-edge device ensures seamless and safe transportation, setting an unparalleled standard for reliability and efficiency in the mining industry.