The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Seamlessly navigating inclines, declines, and sharp turns, this innovative solution far surpasses traditional soft couplings. It effectively eliminates vehicle collisions during multi-vehicle transport operations, adeptly addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that may arise during ascent, descent, and turning maneuvers. This exceptional device ensures seamless, safe transportation, setting an unparalleled standard for reliability in the mining industry.