Abstract: Adhering tin is the main cause that reflow conductor roll abates which works in the electroplating tin line （ETL）. Removing the tin by means of chemical method is the important measures prolonging the servicing life of conductor roll. The tin remover whose main compositions are NaOH and KOH and assistant compositions are Na₂PbO₂ or K₂PbO₂ and NaNO₃ or NaNO₂ has excellent removing tin effect, while the temperature of removing tin liquid is 40- 80℃, and the temperature of conductor roll reaches 40-70℃. After removing the adhering tin layer of reflow conductor roll, the roughness of adhering tin conductor roll can resume to 4.0μm, its service life is increased by 80%, and repairing cost is decreased by 90%, and replacing conductor roll time can be obviously decreased, and production rate of ETL can be enhanced.