The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic conditions of underground tunnels. Designed to navigate inclines, declines, and sharp turns with unparalleled efficiency, this innovative solution outperforms traditional soft couplings. It decisively eradicates vehicle collisions during multi-vehicle transport operations, tackling and resolving critical issues such as front lifting, rear compression, and operational accidents that occur during ascent, descent, and turning. Delivering seamless and secure transportation, this device sets a new benchmark for reliability and safety in the mining industry.