The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating through inclines, declines, or sharp turns, this groundbreaking solution excels where traditional soft couplings fail. It effectively eliminates vehicle collisions during multi-vehicle transport operations, addressing and resolving 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 benchmark for reliability and safety in the mining industry.