The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and ever-changing conditions of underground tunnels. Whether it's navigating steep inclines, sharp declines, or tight turns, this groundbreaking solution outperforms traditional soft couplings. It proficiently eliminates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps that can occur during ascent, descent, and turning. This device guarantees seamless and safe transportation, establishing a new benchmark for reliability and efficiency in the mining industry.