The reinforcement technology of prestressed aramid fiber cloth with permanent anchorage is developed, the construction technology of concrete flexural members reinforced by prestressed aramid fiber cloth with permanent anchorage is given, the stress relaxation loss test research of prestressed aramid fiber cloth is carried out, the bending, shear and fatigue performance test research of prestressed aramid fiber cloth reinforced concrete beam is carried out, and the temperature bonding of aramid fiber cloth is carried out Experimental study on the influence of mechanical properties of materials. The test results show that the cracking load, yield load, ultimate load, fatigue life and flexural stiffness of the prestressed aramid fiber reinforced concrete beam with permanent anchorage are significantly increased compared with the unreinforced reference beam. When the ambient temperature is below 60℃, the bonding strength of the matching resin adhesive and the base adhesive of the aramid fiber cloth will not soften. The experimental research and analysis show that the reinforcement technology of prestressed arylon fiber cloth with permanent anchorage can significantly improve the mechanical properties of concrete flexural members in the use stage.