The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating steep inclines, declines, or sharp turns, this groundbreaking solution significantly outperforms traditional soft couplings. It adeptly eliminates vehicle collisions during multi-vehicle transport operations, effectively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. By ensuring seamless and safe transportation, this device sets a new benchmark for reliability and performance in the mining industry.