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