The interfacial properties between textile reinforced concrete (TRC) and existing concrete were studied by double-side shear tests. Based on the plasticity limit analysis theory and the interface model between new and old concrete,the interface model of TRC and conventional concrete was modified,and the theoretical calculation formula of maximum cohesive force between their interfaces under the conventional environment was derived. Subsequently,according to the experimental results of the interfacial bond strength between their interfaces under the effect of different number of sodium chloride solution wet-dry cycles，the environmental impact coefficient was fitted. The theoretical calculation formula of the bond strength between the TRC and conventional concrete under wet-dry cycle was then derived. By comparing the relative error between theoretical and experimental results,the correctness of the theoretical model and calculation formula were verified.