Scaling is an important sequence of the operation in wire-rod production. While wire-rods are scaled with abrasive water-jet, the abrasive water-jet can exert even impact and abrasion action on the entire periphery of wire-rods and, if with its related process parameters well adjusted, is able to increase scaling efficiency greatly and ensure the quality of scaling so as to meet the requirements, of rapid and continuous scaling of wire-rods.