Prestressed steel wire is a general term for steel wire made of high quality high-carbon steel plates after acid washing, cold drawing or stable treatment after phosphating. According to the different production technology, it can be divided into two types: cold drawing steel wire and stress eliminating steel wire. According to the different surface conditions, it can be divided into plain steel wire, indentation steel wire, spiral rib steel wire. Cold drawing wire is a steel wire directly used for prestressed concrete after cold drawing.