The hard coupling device for mine flatbed trucks is precisely engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this groundbreaking solution far outperforms traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, meticulously addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascents, descents, and turns. This device ensures flawless and safe transportation, setting an unprecedented standard for reliability and safety in the mining industry.