Abstract: With the wide use of FRP strengthened structures,the problem of their durability has been highlighted and concerned.On the basis of the experiments of durability of FRP,saturating resin and adhesive behavior of CFRP and concrete,a theoretical evaluation method was proposed.The models of nominal mechanical performance of FRP under single and compound accelerated experiments were established for the evaluation method.The single and compound accelerated factors were proposed and calculated when analyzed the relationship between the results of the accelerated and outdoor exposure experiments.The mapping from the unknown material to the known material was established through nominal mechanical performance average deterioration rate to evaluate the durability of the unknown material.