<p>In this study, the flexural behavior of reinforced concrete beams strengthened with prefabricated mortar laminates reinforced with high-performance fiber-reinforced cementitious composite (PML-HPFRCC) was examined both numerically and experimentally. In addition to conducting bending tests on reinforced concrete beams, the performance of prefabricated mortar laminates was examined under both static and cyclic loading conditions. Three reinforced concrete beams were analyzed, including one reference beam and two reinforced with polymer fiber-reinforced prefabricated mortar laminates, featuring volume percentages of micro steel and polyvinyl alcohol contents of 1.8% and 0.5%, respectively. Numerical studies were conducted to evaluate the effects of the height of the strengthening plate and the percentage of reinforcement bars. The results from four-point bending tests demonstrated that the load-bearing capacity of beams reinforced with three and four polymer bars increased by 189% and 284%, respectively. Additionally, elastic stiffness increased by 28% and 92%, while energy absorption capacity decreased by 43% and 2.6%.</p>