The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Regardless of navigating steep inclines, sharp declines, or tight turns, this groundbreaking solution surpasses traditional soft couplings' limitations. It effectively eradicates vehicle collisions during multi-vehicle transport operations, thoroughly addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that typically occur during ascent, descent, and turning. This advanced device guarantees seamless and safe transportation, establishing an unprecedented standard for reliability and performance in the mining industry.