The shear responses of reinforced concrete beams strengthened with HPFL were experimentally investigated. In the test, six restrained RC beams strengthened with HPFL and three control specimens without strengthening were used. At the same time, seven simply supported beams under point concentrated load with one unstrengthened and nine simply supported beams under two points concentrated load with three unstrengthened were included. The beam performances were compared and assessed with particular emphasis on cracking behavior and shear capacity. The results have shown that HPFL can obviously increase the crack-resisting capacity and the shear resistance of beams. The recommended formula of shear resistance of beams strengthened with HPFL was proposed on the basis of the experimental research. The calculated values have good agreement with the test results. Combining the test data with the standard named Technical Specification for Strengthening Concrete Structures with High Performance Ferrocement Laminate, the standard formula and engineering sample calculation were introduced in the text.