The invention discloses an optical round 
wire rod reinforcement bar for producing a 
prestressed concrete steel rod and a 
processing method. A steel blank comprises in percentage by weight: 0.25-0.30% of C, 0.90-1.10% of Si, 0.50-0.70% of Mn, 0.015-0.030% of Nb, 0.0020-0.0040% of B, no more than 0.020% of S, no more than 0.020% of P and the balance of Fe and inevitable impurities; the optical round 
wire rod reinforcement bar with the nominal 
diameter of 8.0-14.0mm is produced by heating and performing controlled rolling and controlled cooling to the steel blank, and has the following characteristics that the tensile strength (Rm) is 630-660MPa, the 
percentage reduction of area is more than or equal to 65%, and the 
ferrite grain size is 10.0-11.5 level. Through integration and creation of converter melting, LF melting, steel blank heading and multiple technology of standard and 
delay type controlled rolling and controlling cooling and the like, the invention provides a production method of the optical round 
wire rod reinforcement bar for producing the 
prestressed concrete steel rod, and the product is high in 
hardenability, and uniform in microscopic structure. The method has the advantages of excellent quality, low production cost, good processability, strong popularization and the like.