The continuous pickling line is an important process in the production of cold-rolled steel sheets. It effectively removes the residual emulsion of the rolling mill and other impurities by passing the steel coil through a series of steps such as pickling washing tank cleaning and soaking, electrolytic degreasing, brushing and drying, thereby eliminating the adhesion between the convection plate mark and the steel plate after bell furnace annealing, and significantly improving the surface quality of the steel plate.? Meets the users' increasing demand for the quality of cold-rolled products,? improves the production efficiency, and ensures product quality stability.