The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and ever-changing conditions of underground tunnels. Whether negotiating steep inclines, sharp declines, or tight turns, this groundbreaking solution significantly outperforms traditional soft couplings. It eradicates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues like front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning maneuvers. This device guarantees seamless and safe transportation, establishing a new benchmark for reliability and performance in the mining industry.