Abstract: The bond behavior at the interface between CFRP and concrete is a key factor to affect the behaviors of RC members strengthened with CFRP. So this paper investigates the bond behavior in beams subjected to constant bending moments. Firstly, this paper establishes an analytical model describing bond stress and slip relationship at inter-crack CFRP-concrete interface, which could be used to analyze the distributions of interfacial slip and bond shear stress, as well as yield the stress distributions of the elements strengthened with CFRP, which facilitates the study of cracking behavior. The experimental CFRP strain distributions are compared with the theoretical results, indicating that CFRP strain distribution deduced from the analytical model agree well with the experimental results.