The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and dynamic environments of underground tunnels. This innovative solution is designed to navigate inclines, declines, and sharp turns with ease, where traditional soft couplings often fail. It effectively prevents 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. By ensuring seamless and safe transportation, this device sets a new benchmark for reliability and safety in the mining industry.