With the wide use of FRP strengthened structures,the problem of their durability has been highlighted and concerned.The durability of saturating resin which is one of components of fiber reinforced polymer and adhesive material of FRP and concrete,affects the property of FRP reinforced structure.The accelerated and outdoor exposure experiments of the durability of two kinds of resins were carried out,and the relationship between them was analyzed and calculated.The results showed that the influence on the durability of the resin caused by combination of each factor of outdoor exposure was more serious than that caused by single accelerated factor.