The hard coupling device for mine flatbed trucks is expertly crafted to excel in the demanding and ever-changing environments of underground tunnels. Whether maneuvering through inclines, declines, or sharp turns, this groundbreaking solution outperforms traditional soft couplings. It effectively prevents vehicle collisions during multi-vehicle transport operations, tackling and resolving critical issues such as front lifting, rear compression, and operational mishaps that may occur during ascent, descent, and turning. This device guarantees flawless and safe transportation, establishing a new benchmark for reliability and safety in the mining industry.