The hard coupling device for mine flatbed trucks is meticulously engineered to thrive in the challenging and ever-changing conditions of underground tunnels. Whether surmounting steep inclines, navigating declines, or maneuvering sharp turns, this state-of-the-art solution excels where conventional soft couplings falter. It adeptly eliminates vehicle collisions during multi-vehicle transport operations, addressing and resolving critical issues such as front lifting, rear compression, and operational mishaps during ascent, descent, and turning. This innovative device ensures seamless and safe transportation, setting an unprecedented standard for reliability and performance in the mining industry.