The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of subterranean tunnels. Whether negotiating inclines, declines, or sharp turns, this advanced solution outperforms traditional soft couplings. It adeptly prevents vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps during ascent, descent, and turning. This state-of-the-art device ensures seamless, safe transportation, setting an unprecedented standard for reliability and efficiency in the mining industry.