The hard coupling device for mine flatbed trucks is meticulously engineered to excel in the demanding and ever-changing underground tunnel environments. Designed for navigating challenging inclines, declines, and sharp turns, this innovative solution outperforms traditional soft couplings by mitigating vehicle collisions during multi-vehicle transport operations. It adeptly addresses and resolves critical issues such as front lifting, rear compression, and operational accidents that frequently occur during ascent, descent, and turning. By ensuring seamless and secure transportation, this device sets a new benchmark for safety and reliability in the mining industry.