Method for reducing water-ripple-shaped defects on surface of steel plate

The invention discloses a method for reducing water-ripple-shaped defects on the surface of a steel plate. The method is characterized in that the steel plate comprises iron and the following components of, in percentage by mass, less than or equal to 0.20% of C, 0.25%-0.60% of Si, less than or equal to 2.0% of Mn, less than or equal to 0.80% of Ni, less than or equal to 0.80% of Cr, less than or equal to 0.6% of Mo, less than or equal to 0.80% of Cu and less than or equal to 0.65% of CEV. The method comprises the processes of heating, rolling and cooling, conventional heating parameters are adopted, temperature waiting time is properly increased, meanwhile, descaling hitting pressure of a finishing mill is reduced from 20 Mpa-22 Mpa to 11 Mpa-13 Mpa, surface oxide layer is removed, compact oxide layer is reserved, the purpose of reducing the 'water ripple-shaped ' defects on the surface of the steel plate is achieved, meanwhile, according to the scheme, equipment does not need to be transformed, and the meth