The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and ever-changing conditions of underground tunnels. Whether confronted with inclines, declines, or sharp turns, this state-of-the-art solution surpasses traditional soft couplings, providing unparalleled performance. It proficiently eliminates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical challenges such as front lifting, rear compression, and operational accidents that may occur during ascent, descent, and turning. This device guarantees seamless and safe transportation, thereby setting a new benchmark for reliability and safety in the mining industry.