The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and ever-changing conditions of underground tunnels. Designed to navigate inclines, declines, and sharp turns with unparalleled efficiency, this innovative solution outperforms traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational accidents during ascent, descent, and turning maneuvers. By ensuring seamless and safe transportation, this device sets a new benchmark for reliability and operational excellence in the mining industry.