The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether traversing steep inclines, navigating sharp declines, or maneuvering through tight turns, this innovative solution outperforms traditional soft couplings that often fail under such extreme conditions. It effectively eliminates the risk of vehicle collisions during multi-vehicle transport operations, comprehensively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. By ensuring seamless and safe transportation, this device sets a revolutionary new standard for reliability, safety, and performance in the mining industry.