Laying head driving gear box adopts to welding structure. The gear and bearings in the box are thin oil central lubrication process. Spinning head is installed in the safety guard. Center line down to 10 after the water cooling device of finishing mill group and pinch roll. Laying head does the circular motion to changes the rolled metal from the pinch roll pushed to the 1,080 mm diameter spiral coil, and the tile the spiral coil to scattered volume cooling roller bed(downstream equipment), then fall into the scattered volume cooling conveyor.