Since the early 1950’s, prestressed concrete has been used in the construction concrete structures. Using prestressed concrete offers many advantages such as larger span and thinner elements size compared to the conventional reinforced concrete. Repairs of prestressed concrete structures are necessary when existing tendons are damaged (e.g. corroded, cut, or broken...). The objective of current paper is to focus on repairing of damaged prestressed concrete beams using carbon fiber reinforced polymer (CFRP) fabric technique, and to explore a new technique for the strengthening by stitching the structural elements using external post-tension strands. This work was conducted in order to investigate the suitability of such techniques through laboratory experiments by testing simply supported prestressed beams subjected to bending load. The repaired beams are compared with the control undamaged beam for evaluation purpose. The outcome of this paper will lead to a set of guidelines for optimal repair technique to be used for the repair of damaged presterssed beams. Key words: Prestressed concrete, CFRP, Stitching, Concrete repair, Load Capacity.