The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and ever-changing conditions of underground tunnels. Whether navigating steep inclines, sharp declines, or tight turns, this groundbreaking solution outperforms traditional soft couplings. It masterfully eliminates vehicle collisions during complex multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This device ensures seamless and safe transportation, setting an unprecedented standard for reliability and efficiency in the mining industry.