Many of the concrete structures in the world have been damaged by contact with sulfates, chlorides and other corrosive agents. This has caused a lot of costs to repair, repair, or replace damaged structures around the world. The range of FRP materials has been increasing in recent years to strengthen the shear reinforced concrete beam. In addition to the conventional method, the use of FRP sheets that are bonded to the concrete surface; in this paper, reinforced concrete beams are modeled with pre-tensioned fibers. In addition, in order to increase the compressive strength of concrete under a beam, a pre-tensioned fiber layer was installed. . The beams were evaluated in terms of final load capacity and paddling. The results of the experiments showed that using fiber equal and equal installation intervals, the application of the fiber with an angle of 45 degrees more than 60 fibers with an angle of installation of 60 is greater than 90 degrees.