The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and dynamic conditions of underground tunnels. Designed to navigate inclines, declines, and sharp turns with unparalleled proficiency, this cutting-edge solution surpasses traditional soft couplings. It effectively eradicates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps that may occur during ascent, descent, and maneuvering. This state-of-the-art device ensures seamless and secure transportation, establishing a new benchmark for reliability and safety in the mining industry.