The hard coupling device for mine flatbed trucks is expertly engineered to excel in the challenging and dynamic conditions of underground tunnels. Whether navigating inclines, declines, or sharp turns, this groundbreaking solution surpasses the limitations of traditional soft couplings. 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 guarantees seamless and safe transportation, setting an unparalleled standard for reliability in the mining industry.