Abstract: The experiment of three beams which include a beam contrast, an ordinary carbon fiber reinforcement and a prestressed carbon fiber reinforcement, is carried out. The reinforced effect of carbon fiber slab on reinforced concrete beam is studied. At the same time, the tension anchor equipment is designed, and the complete tension technology is formulated. Through beam bending test, strain, deflection and capacity are studied. Experiment shows that cracking load of reinforced beam is increased, but not obvious, ultimate load increase is relatively improved, and prestressed reinforced concrete beams increases more than ordinary carbon fiber reinforced; in the aspect of increasing stiffness of the beam and decreasing ductility, reinforced effects of prestressed carbon fiber slab is better; slip does not occur during the experiment process, the anchor effect is good, which can effectively delay debonding failure of carbon fiber slab.