The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic underground tunnel environments. Whether navigating inclines, declines, or sharp turns, this advanced solution significantly outperforms traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, tackling and resolving critical issues such as front lifting, rear compression, and operational accidents that primarily occur during ascent, descent, and turning. This state-of-the-art device guarantees seamless and safe transportation, establishing a new benchmark for reliability and safety in the mining industry.