The hard coupling device for mine flatbed trucks is meticulously engineered to thrive amidst the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this pioneering solution excels where traditional soft couplings falter. It effectively eliminates vehicle collisions during multi-vehicle transport operations, adeptly addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This device assures seamless and safe transportation, setting an unparalleled standard for reliability in the mining industry.