The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the challenging and dynamic environments of underground tunnels. Whether navigating steep inclines, sharp declines, or tight turns, this groundbreaking solution surpasses the capabilities 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 typically occur during ascent, descent, and turning. This advanced device ensures seamless and secure transportation, setting an unparalleled new standard for reliability and safety in the mining industry.