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, sharp declines, or tight turns, this cutting-edge solution outperforms traditional soft couplings by a significant margin. It effectively eliminates vehicle collisions during multi-vehicle transport operations, comprehensively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that commonly occur during ascent, descent, and turning. This device ensures seamless and safe transportation, setting an unparalleled standard for reliability and safety in the mining industry, making it an indispensable asset for any mining operation seeking enhanced efficiency and operational security.