Introducing the hard coupling device for mine flatbed trucks, designed to excel in the rigorous and ever-shifting environment of underground tunnels. This groundbreaking solution outperforms traditional soft couplings, ensuring flawless navigation through inclines, declines, and sharp turns. By eliminating vehicle collisions during multi-vehicle transport operations, it tackles and resolves key issues like front lifting, rear compression, and operational accidents that typically occur during ascent, descent, and turning. This device guarantees smooth and secure transportation, establishing an unparalleled benchmark for reliability and safety in the mining industry.