The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this groundbreaking solution excels where traditional soft couplings simply cannot compete. It effectively eliminates vehicle collisions during multi-vehicle transport operations, comprehensively addressing and resolving critical issues such as front lifting, rear compression, and operational accidents that typically occur during ascent, descent, and turning maneuvers. This device guarantees seamless and safe transportation, setting a new benchmark for reliability and safety in the mining industry.