The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Demonstrating unmatched performance, this innovative solution excels in navigating inclines, declines, and sharp turns where traditional soft couplings often fail. By effectively eliminating vehicle collisions during multi-vehicle transport operations, it addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that can occur during ascent, descent, and turning. This device ensures seamless and safe transportation, setting a new standard for reliability and efficiency in the mining industry, thus guaranteeing uninterrupted operations and enhanced safety for all personnel involved.