1. The cow headlock is made of Q235-B material. After welding, the whole is hot-dip galvanized, and the galvanized layer is ≥75μm; 2. After welding, the overall hot-dip galvanizing, the surface of the galvanized necklock is smooth, without drips, roughness, zinc thorns, no peeling, no leakage plating, and no residual solvent slag; 3. Equipped with necklocks, in the open state,the cattle can eat freely; 4. The headlock can simultaneously lock or release the cows feeding within the range of 18-24 meters. 5. It can lock or release all feeding cows at the same time, or lock one or several cows individually; 6. The contact part of the necklock movable rod and the locking mechanism is equipped with acetylene belt damping to reduce noise; at the same time, it is equipped withdamping rubber pads to further reduce noise;