Introducing the hard coupling device for mine flatbed trucks, meticulously engineered to excel in the demanding and ever-changing conditions of underground tunnels. This innovative solution surpasses traditional soft couplings, delivering unparalleled performance on inclines, declines, and sharp turns. Designed to eliminate vehicle collisions during multi-vehicle transport operations, it deftly addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. With this device, seamless and safe transportation is guaranteed, setting a revolutionary new standard for reliability and efficiency in the mining industry.