The production line adopts the advanced shallow tank turbulent hydrochloric acid washing process. The acid liquid is injected from both ends of the acid tank to form a strong turbulent flow in the acid washing tank; the 4-stage cascade countercurrent rinsing process has short time, good effect and acid washing The surface of the rear strip is clean and bright. The core equipment of the production line is equipped with Wuhan Kage narrow narrow connection type online welding machine, a phosphor breaking tension straightening machine is provided in front of the pickling tank, which can effectively loosen the scale on the surface of the steel strip, and a smoothing machine is provided at the outlet of the acid tank to ensure The surface quality of the strip steel, the outlet is provided with a turret disc cutter, the cutting edge can be replaced offline, and the outlet section is equipped with an electrostatic oiler to ensure the thickness and uniformity of the oil film on the surface of the strip steel. Can be directly sold high-strength, ultra-deep pickling board.