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Tn this paper, different contents (0.25%, 0.5%, 0.75% and 1%) of graphene nanoplatelets (GNP) were used to modify epoxy resin adhesive. Through double-sided shear tests of carbon fiber reinforced concrete structures, the change of adhesive properties before and after GNP modification under different time of immersion aging (2, 4, 6, 8 weeks) was studied, and the influence of graphene nanoplatelets modification on the durability of adhesive joint was investigated. The test results show that both the interfacial bonding strength and the maximum slip displacement increase first and then decrease with the increase of GNP content under the nonimmersion and immersion aging tests, and 0.5% GNP has the largest increase rate for interfacial bonding strength under each working condition. After 8 weeks of immersion aging, ().5% GNP increases the bonding strength and maximum slip by 54.1 % and 53.66% respectively. After 8 weeks of aging, the bonding strength of unmodified adhesive decreases by 15.19% compared with the non-aging environment, while 0.5% GNIVEpoxy adhesive only decreases by 10.47%. The GNP reinforced adhesive could not only improve the adhesive joints strength, but also reduce the diffusion of water molecules into adhesive and interface. This paper provides some reference for the application of GNP reinforced adhesive to enhance durability of the carbon fiber bonded concrete structure. [ABSTRACT FROM AUTHOR]