The hard coupling device for mine flatbed trucks is meticulously designed to excel under the rigorous and ever-changing conditions of underground tunnels. Whether dealing with inclines, declines, or sharp turns, this state-of-the-art solution outperforms traditional soft couplings. It adeptly prevents vehicle collisions during multi-vehicle transport, tackling and resolving vital issues like front lifting, rear compression, and potential operational accidents during ascent, descent, and turning. This advanced device guarantees smooth and secure transportation, establishing a new benchmark for reliability and efficiency in the mining industry.