The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Crafted to perfection, this innovative solution excels in navigating inclines, declines, and sharp turns where traditional soft couplings falter. It effectively eliminates vehicle collisions during multi-vehicle transport operations, offering a robust solution to critical issues such as front lifting, rear compression, and operational mishaps during ascent, descent, and turning. With this device, seamless and safe transportation becomes a reality, setting an unparalleled standard for reliability and efficiency in the mining industry.